Circuit Hollow2–5 min
2048
2048 is a tactile spatial puzzle about changing the board without trapping your next move.
Stack Harbor
Stack Harbor is a tactile spatial puzzle about changing the board without trapping your next move. Slide, rotate, stack, or connect pieces until the whole system clicks into place.
ST
Ready when you are
Stack Harbor
Load all four containers onto the ship from heaviest to lightest. Tap the stack to unload its top container when you need to correct the order.
No sign-up · Saves on this deviceHow to play
Small rules. Plenty to master.
Stack Harbor is a tactile spatial puzzle about changing the board without trapping your next move. Slide, rotate, stack, or connect pieces until the whole system clicks into place. Runs stay short, but alternate goals and personal bests create a strong one-more-try loop. Its identity comes from a distinctive objective and rule twist rather than a cosmetic reskin. A typical session lasts three to eight minutes, works comfortably with touch or keyboard, and saves progress without requiring an account.
01
Learn the move
Load all four containers onto the ship from heaviest to lightest. Tap the stack to unload its top container when you need to correct the order.
02
Build a run
Pause before committing when the board changes.
03
Beat your best
Short, consistent streaks score better than risky guesses.
Controls & accessibility
Controls: Touch, pointer, and keyboard. The game supports reduced motion, color-independent cues, clear focus states, and a touch-first layout.
Frequently asked
Do I need an account?
No. Play instantly; an account is only needed to sync progress.
Does it work on mobile?
Yes. Every launch game is designed and tested for touch.