Modstack: Programming Puzzle

Tiny code puzzles. Stack Move, Turn, Mirror, and Repeat tiles, guide the robot, and beat par. Free chapter + Daily; $3.99 once unlocks all.

Modstack is a tactile programming puzzle about making big moves with a small set of commands.

Place Move and Turn tiles into a program, stack modifiers to change what they do, then run your machine. Watch the robot execute each step, learn from the result, and compress your solution until it reaches par.

WHAT YOU GET

• 36 handcrafted campaign circuits across six chapters
• A gentle visual introduction to programs, repetition, and mirroring
• Ordered relays, switches, gates, and precision Expert Circuits
• A new Easy, Medium, and Hard Daily Circuit every day
• Layered hints that nudge without giving away the whole solution
• Offline play with progress stored on your device
• Purpose-built sound and haptic feedback
• No ads, no account, and no tracking

The Foundations chapter and Easy Daily are free. A single Full Game Unlock opens the remaining 30 campaign circuits plus Medium and Hard Daily. There is no subscription.