STACK

How to Play STACK

Drop seeds, water, and stones into a tiny tray. Matching objects collide and evolve into trees, lakes, and mountains in STACK, a relaxing physics puzzle with endless worlds, undo, and automatic saving. STACK runs right here on MassiveClip — no install, no account, no waiting. It works on desktop and mobile, and your personal best is saved in your browser.

• Move to aim · click or release to drop
• Match two of the same shape to evolve
• Arrow keys to aim · Space to drop
• U undo · P pause · M sound
• gamepad supported