Tool · Language learning
🔤 JLPT N5 Kanji Drill
Simple kanji practice page for JLPT N5 learners. Designed for quick drills, browsing characters and testing yourself.
AI-assisted • Claude
What is this?
This repo is a small playground for tiny web apps and visual experiments. Most of them were created with the help of different AI models (I often use Claude and Gemini), plus some manual tweaking.
- Each idea lives in its own folder.
- Everything is static – just HTML, CSS and JavaScript.
- Use the tag filters on the right to find tools by topic or model.
⚙️
Note: All tools here are AI-assisted. Code was generated and edited using
language models, then adjusted by hand where needed.
Tool · Simulation
🦅 Boids + Predator–Prey
Interactive flocking simulation with predators, reproduction and starvation. Tune parameters live and watch the ecosystem evolve.
AI-assisted • Claude
Tool · Productivity
📓 LocalNotes – Notion-like
Local, Notion-inspired editor with blocks, slash commands, multiple choice questions, math support and light/dark theme.
AI-assisted • Claude
Tool · Japanese text
🖍️ JP Text Highlighter – Furigana & Romaji
Japanese text helper for studying lyrics and sentences: switch between kanji + furigana and romaji, highlight segments in different colors, and save your highlights as JSON.
AI-assisted • Claude
Tool · Spreadsheet
📊 SheetClone – Mini Spreadsheet
Small spreadsheet-like app with formulas, formatting, multiple sheets and charts. Useful for experimenting with grid logic and data manipulation directly in the browser.
AI-assisted • Gemini
Experiment · Arcade Game
🌒 Lunar Miner
A 2D lunar mining arcade experiment made with p5.js: dig through low-gravity terrain, collect crystals, avoid collapsing tiles, and survive as long as possible.
AI-assisted · Claude
Experiment · 3D Visuals
✨ Drone Light Show
An interactive 3D drone light show built with Babylon.js: dynamic formations, adjustable drone count, animation speed, and cinematic camera paths.
AI-assisted · Claude
Tool · Game
⚔️ MicroRTS game
A tiny browser-based real-time strategy prototype inspired by Age of Empires — with villagers, resources, buildings, and training queues.
AI-assisted • Claude
Experiment · WebGPU Simulation
🌌 N-Body Gravity Simulation
N-body gravitational simulation with a WebGPU compute shader (tiled shared-memory) and a WebGL2 fallback. Real-time controls, multiple scenarios, and lots of particles.
AI-assisted • Claude
Tool · RTS Space Battle
🛸 VOID COMMAND game
2D RTS space battle sandbox. Build your fleets, tweak ship types and AI behavior, then watch massive battles play out with replays, batch simulations and training runs.
AI-assisted · Claude
Experiment · WebGPU Visuals
🎆 Fireworks Show
High-density WebGPU fireworks with multiple effect types, auto-show mode, manual type selection, and deep control over color, scene and particle detail.
AI-assisted · Claude
Experiment · Gravitational Lensing
🕳️ Black Hole Lensing
Real-time WebGPU black hole renderer with Schwarzschild-inspired ray marching, accretion disk, Doppler effects, starfield, nebula and cinematic camera controls.
AI-assisted · Claude
Game · Retro submarine shooter
🚢 Abyss Runner
Retro CRT-style underwater shooter with torpedoes, enemy submarines, mines, checkpoints, air, lives and score tracking.
AI-assisted · Claude
Experiment · Neuroevolution
🧠 Abyss Runner — Neural Evolution Lab
A population of autonomous submarines learns to survive the Abyss Runner world through neural networks, selection, crossover and mutation.
AI-assisted · Claude
Experiment · WebGPU simulation
🐦 Murmuration — WebGPU Boids
High-density 3D flocking simulation with up to hundreds of thousands of boids, obstacle avoidance and live behavior controls.
AI-assisted · Claude
Game · ROM analysis experiment
💣 Bomberman — ROM-Derived Remake
Browser remake and technical study featuring decoded cartridge graphics, live game state, extracted tilesheets and documented 6502 routines.
AI-assisted · Claude
Gallery · Chaos and fractals
🌀 The Math Beauty Gallery
Interactive gallery of roughly 50 chaotic systems, strange attractors, fractals and mathematical visualizations with adjustable parameters.
AI-assisted
Simulation · Emergent societies
🏛️ Civilization Simulation
Agent-based civilization sandbox with tribes, settlements, trade, technology, conflict, disease, disasters and evolving traits.
AI-assisted · Claude
Tool · Imaging pipeline
📷 Computational Imaging Lab
Interactive imaging workstation for HDR fusion, deconvolution, multi-frame night processing, frequency analysis and shader-based experiments.
AI-assisted · Claude
Generator · Procedural mineralogy
💎 Crystal Druse Generator
Procedural crystal specimen generator with mineral species, host shapes, growth controls, inclusions, optics and material settings.
AI-assisted · Claude
Game · GPU co-evolution
⚔️ Crystal Wars — Evolution
WebGPU battle lab where two tactical lineages evolve unit mixes, bomber behavior and watchtower placement across generations.
AI-assisted · Claude
Lab · Coherent imaging
🔭 Digital Holography Console
Digital holography console for recording and reconstructing coherent scenes with wavelength, depth, sensor and reference-angle controls.
AI-assisted · Claude
Simulation · Earthquake intensity
🗾 Japan Seismic Simulation
Interactive Japan earthquake model with configurable magnitude, depth and attenuation, MMI intensity mapping and city seismograms.
AI-assisted · Claude
Simulation · Sensor scanning
📡 LiDAR Sensor Simulation
Configurable 2D and 3D LiDAR simulator with scan frequency, angular resolution, noise, dropout, presets and moving objects.
AI-assisted · Claude
Simulation · Mapping and localization
🤖 LiDAR · SLAM Simulation
3D LiDAR SLAM visualization with ground-truth and estimated poses, drift, ICP registration, point clouds and reconstructed mapping.
AI-assisted · Claude
Tool · Trail planner
⛰️ Mountain Routes
Map-based mountain route planner with GPX tools, smoothing, simplification, map matching and multi-track centerline merging.
AI-assisted · Claude
Experiment · Particle field
✨ FIELD/100K — WebGPU Particle Lab
Interactive WebGPU particle field with gravity, repulsion, cursor forces, damping and selectable particle counts.
AI-assisted · Claude
Game · Card classic
♠️ Klondike Solitaire
Self-contained browser version of Klondike Solitaire with move counting, timer, new-game controls and win detection.
AI-assisted · Claude
Game · Procedural defense
🏰 Procedural Tower Defense
Tower defense game with generated paths, multiple tower types, upgrades, mines, a nuke ability, speed controls and 20 waves.
AI-assisted · Claude