Alien invasion is a 2D space shooter web game. You control
small spaceship and shoot aliens. Each new level introduce new kind
of alien. Some aliens drop gold which can be used to improve ship.
Some aliens can shoot back. Use on screen arrows to move ship and
press fire button to shoot nearest alien. Game is best playable in
landscape mode. When you collect enough gold you can buy ship
improvements in the shop. Aliens cause damage to ship when they
are too close or when they shoot at your ship. Life indicator is at
upper left corner. Source code is available on github.
Balloon mountains
Fly over mountains and pop balloons, web game, canvas
Fly over misty mountains and pop balloons. Avoid black balloons.
There are many different levels. You receive stars for completing
levels and for completing achievements. Many different balloons affect
game play. Red balloon makes you go faster, brown balloon slower,
yellow balloon confuses, gray balloon will make you lose color
vision and and black balloon kills you. Source code is available on github.
Ghost car challenge
Compete against other drivers, web game, WebGL
First you drive one lap to qualify. Then you can choose your opponent.
You compete on the same track and you see how your opponent drove.
When you are too slow, you just drive another lap until you beat your opponent.
When you drive faster you move up in the table. The goal is to get to the top.
You can choose from 10 different cars and 7 different tracks.
It's real fun shaving off milliseconds of your time each lap to beat the opponent.
Source code is available on github.
Ghost chat bot
Chat with simple AI, web game
Ghost is simple chat bot app, it predates LLMs but it's still ok. You write something, Ghost reply
back. You can modify answers if you don't like them, this is how
Ghost learns new stuff. Source code is available on github.
Ghosttown
Non-action walk & talk adventure, web game, canvas
Ghosttown is a town populated entirely by chat bots. Each with
different personality. They live and work in various places within
town. You can walk around and talk to them. There are also some
quests where you can do more complex stuff. Source code is available on github.
Ghost town 2: monster survival
Action sequel to Ghosttown, web game, canvas
Action sequel to the Ghosttown game. Magic book got stolen from
Ghost town library. Then monsters started appearing all over the town.
Mayor needs your help to defeat those monsters, find out who summoned
them and find the magic book. Source code is available on github.
Robot puzzle
Control robot using simple instructions to solve puzzles, web game, canvas
You control robot using simple instructions (forward, left, right, repeat, pick, drop, ...) and
your goal is to solve logical puzzles, each puzzle have different goal. There are multiple solutions
to each puzzle, the less instructions and less steps you use the more stars you receive.
Source code is available on github.
Word puzzle
Crossword like puzzle, web game
Place letters that appears on the top of the screen anywhere,
when you create English word you get one point, otherwise you lose one point.
Source code is available on github.
Virtual boyfriend
Talk with Sebastian, web game
Virtual boyfriend is your virtual boyfriend companion.
You can talk to him and he will reply in English.
It uses speech synthesis for talking and microphone for voice recognition.
You can go on a date on a beach or to the restaurant or visit his room or you can try
different clothes and have fun. There are 6 different clothes in 23 different colors.
Source code is available on github.
Beach volleyball
web game, canvas
Simple 2D web game where you play beach volleyball against opponent, swipe up (or use a mouse) to hit and direct the ball.
Source code is available on github.
Hide and seek
web game, canvas
Simple web game where you look for a ghost in a pixel art forest using flashlight.
Source code is available on github.
Trash everything
web game, canvas
Pixelart web game where you destroy (almost) everything in every level.
Different objects explode and produce unique sounds.
Source code is available on github.
Callisto space simulator
web game, canvas
Realistic Newtonian visual and instrumental space flight simulator.
You are a pilot of a small space ship on Jupiter's moon Callisto. First you will go through few training missions and then you can start completing various missions: Refueling, finding lost equipment, checking for damages, using radio to find pirates, checking ships, docking and many more.
All objects behaves according to Newtonian physics and ships use realistic current day rocket technology. Instruments are in sort of 80's space tech style with lot of analog gauges and only bare minimum of computers.
This game is quite hard and missions are quite long. There are 24 missions, each lasts from 10 minutes to few hours or more.
Source code is available on github.
Electronics software
Spice diode model
web app, electronics software
Web app that finds SPICE diode model (IS, N, RS parameters) from measured AV curve. Simply paste CSV data,
click start and in few minutes you will have very accurate diode model. This tool runs in browser.
Source code is available on github.
Find similar diode
web app, electronics software
Web app that finds similar diode from your measured AV curve by comparing it to known and previously measured
diode curves. Simply paste your diode CSV data, click "Similar 3" and 3 most similar diode curves will be shown.
This tool runs in browser.
Source code is available on github.
stripboard2schematic
web app, electronics software
Web app that converts stripboard layouts back to schematics, either for checks or if schematic was lost.
This tool runs in browser.
Source code is available on github.
switched-reluctance-motor-configurator
web app, electronics software
Web app that helps you explore various combinations of coils and poles of switched reluctance motors.
For example with combination of up to 12 coils and poles, there is 144 combinations, out of which only 92 produce valid motors.
This tool runs in browser.
Source code is available on github.
what-can-i-build
web app, electronics software
This web app allows you to find circuits (mostly guitar pedals) that you can build with parts you have.
Fill in parts you have and it will show you what you can build.
This tool runs in browser.
Source code is available on github.
ngspicejs
linux, electronics software
JS frontend to ngspice electronics simulation software. Unlinke ngspice which uses weird mid-80s scripting language,
ngspicejs uses JavaScript as scripting language. It has better error messages and built in linter.
Search-friendly documentation (simple examples instead of one 723-page long PDF file). And over all less frustrating experience.
It supports sixel graphics in terminal and can create animated gifs (for example how blending pot affects output of octaver circuit).
This tool runs only in Linux (tested on Ubuntu 22.04).
Source code is available on github.
jfet-model-maker
linux, electronics software
A ngspicejs script that helps you create super accurate JFET level 2 spice models from measured transistor curves.
It usually takes between 10 minutes and 10 hours to find good model.
This tool runs only in Linux (tested on Ubuntu 22.04).
Source code is available on github.
lc-oscillator-finder
linux, electronics software
A ngspicejs script that finds novel LC oscillator topologies.
In config file you define how many components to use, the script will then generate random
topologies and test if they are oscillating. If so it prints the result.
Using this tool I found hundreds of different oscillators.
This tool runs only in Linux (tested on Ubuntu 22.04).
Source code is available on github.
pedalgen
linux, electronics software
Pedalgen is a ngspicejs script that generates random network of components
(resistors, capacitors, inductors, diodes, NPN and PNP transistors) and then simulates
them in ngspicejs. Then it performs Transient analysis, measures AC characteristic
and FFT and compare the results with user-specified requirements. If the pedal matches
the requirements it is saved, all charts are saved as gif images and wav file with 3s
long chord is passed through the pedal and output is saved as wav file.
Then new pedal is generated and cycle continues. After few minutes you can have tens
of pedals generated which you can then review and build the ones you like.
This tool runs only in Linux (tested on Ubuntu 22.04).
Source code is available on github.
Android apps
Euro mince
Android app, offline, Slovak only
This simple app will help you collect Euro coins. Did you know there
are over 800 different Euro coins you can collect. Each coin has image
and description. App is only available in Slovak language.
It works on most Android phones and APK has approx 40 MB and works completely offline.
Furigana browser
Android app, web browser
This android app converts Japanese text (kanji, kana) to Latin (roumaji) as a text with small
hints above each word how to pronounce it. For known words it also displays English meaning of the
word when you tap on the word. It also contains adblocking.
It works on most Android phones and APK has approx 5.5 MB.
RSS reader
Android app, online
RSS reader allows you to subscribe to RSS, RDF or ATOM feeds of your
favorite websites. Once you hit the refresh all feeds are downloaded and
then can be read offline (not articles itself just the summaries). You can
star articles to read them later. Articles can be downloaded.
It works on most Android phones and APK has approx 5 MB.
Bills
Android app, offline
Bills is simple app for tracking your expenses. You can add all
your expenses and see various charts and statistics that will help
you save money. You can also create groceries lists. App does not
require any permissions.
Chrome extensions
Domain whitelist
World's smallest ad blocker
This extension only allow requests from user-defined list of
domains. By default it blocks all HTTP requests. If you want to see
some website, you must explicitly allow its domain (in popup window
displayed when you click on DW button). After you install DW, first
few hours will be very intense! It's not for everybody.
DW is extremely small, the source code has only 5 kB. This is
extremely important because now anybody can read the source
and understand it.
Furigana
Kanji to Roumaji converter
This chrome extension converts Japanese text (kanji, kana) to
Latin (roumaji) as a text with small hints above each word how to
pronounce it. For known words it also displays English meaning of
the word when you hover the mouse. Unlike similar extensions
(e.g. IPA Furigana), this one converts all kanji, not just the hard
ones. It also converts hiragana and katakana.
Inject-JS
Inject custom JS to any website
It allows you to define JS code to be executed on sites you
specify. It requires knowledge of JS, intended audience are
programmers.
RSS reader
Replacement for Google Reader
RSS Reader (RR) is chrome extension for reading news feeds. It is
my attempt to recreate Google Reader which was discontinued some
time ago. Because Chrome extension can make AJAX request to any
domains, it is possible to create RSS reader completely without
any server backend. This is interesting fact because no matter how
many people will use it, there would be no need for more server
resources. The downside is that storage is somewhat limited,
currently to 5 MB so that RR does not actually store the feeds data.
Tc calculator
JS clone of BC calculator
Simple offline BC-like calculator for programmers with support for
user defined functions and history. There are no buttons (unlike XCalc)
but you simply type expression you want to evaluate. Tc use plain
JS for evaluation so you can use almost any valid JS
code. There are over 60 built in functions, very extensive help.
