Every project, explained

All 21 Remix Library projects: how each one works, the settings worth changing, and challenges from easy to hard. Great for planning lessons, or for figuring out where to start poking.

Games

• Castle Escape A text adventure: explore the castle, find the crown, and get out. Type commands to play. Python · Beginner · input() and loops, Dictionaries, Lists
• Flappy Square Tap to flap through the pipes. Gravity is not your friend. Web · Beginner · Gravity & velocity, Spawning objects, Collision boxes
• Rock Paper Scissors AI Play against a computer that learns your habits and tries to predict your next move. Python · Beginner · input() and while loops, Dictionaries, Lists as history
• Snake The classic: eat the food, grow longer, don't bite yourself. Web · Beginner · Canvas drawing, Arrays, Keyboard events
• Space Miner Clicker Click the asteroid, buy drills and robots, and watch the crystals pile up. Web · Beginner · Buttons & click events, Updating the page with JS, setInterval
• Brick Breaker Bounce the ball, smash every brick. Aim with where it hits the paddle. Web · Intermediate · requestAnimationFrame, Collision detection, Velocity & angles
• Pixel Jumper A platformer with 3 levels: run, jump, grab coins, dodge spikes, reach the flag. Web · Intermediate · Tile maps, Gravity & jumping, Collision with walls

Art & Animation

• ASCII Art Studio Turn words into giant banners, draw the Mandelbrot fractal, and make patterns, all out of text. Python · Beginner · Strings & loops, Nested loops for 2D pictures, Dictionaries of lists
• Fireworks Click anywhere to launch a firework. Hundreds of glowing particles, a few lines of physics. Web · Beginner · Particle systems, Gravity & friction, HSL colors
• Warp Speed Fly through a 3D starfield. Move the mouse to steer, hold to go to lightspeed. Web · Intermediate · 3D perspective projection, Animation loops, Mouse position

Music & Sound

• Synth Keys Play a synthesizer with your keyboard. Pick a waveform and watch the sound wave live. Web · Beginner · Web Audio oscillators, Frequencies & musical notes, Keyboard events
• Beat Maker A 16-step drum machine. Every sound is synthesized from scratch with code. Web · Intermediate · Web Audio API, Oscillators & noise, Precise timing

Techy

• ChatBot Buddy Build a chatbot from rules: it remembers your name, does math, tells jokes and talks back. Python · Beginner · Regular expressions, Dictionaries as memory, Functions as data
• Matrix Rain The famous falling green code. Type a message and watch it hide in the rain. Web · Beginner · Canvas text, Arrays as columns, Randomness
• Secret Codes Encrypt messages with a Caesar cipher, then crack codes without the key, like a real codebreaker. Python · Beginner · Strings & characters, The % (modulo) operator, Functions
• Game of Life Conway's famous simulation: four simple rules, and patterns that seem alive. Web · Intermediate · 2D arrays, Cellular automata, Counting neighbors
• Probability Lab Roll dice 10,000 times, estimate π by throwing random darts, and see math turn into pictures. Python · Intermediate · Simulations, The random module, Counter & dictionaries
• Sorting Visualizer Watch bubble, insertion, selection, merge and quick sort race. Count every compare and swap. Web · Intermediate · Sorting algorithms, Generator functions (yield), Big-O in practice
• Maze Maker & Solver Generate a random maze with depth-first search, then solve it with breadth-first search. Python · Advanced · Depth-first search, Breadth-first search, Stacks & queues

Useful Apps

• Pixel Painter A tiny pixel-art editor with a palette, eraser and fill bucket. Your art is saved automatically. Web · Beginner · Building a grid with CSS, Click & drag, Flood fill (recursion)
• Tech Trivia A quiz app about computers and the internet. Swap in your own questions on any subject. Web · Beginner · Arrays of objects, Creating buttons from data, Keeping score