JUMP AND EDIT LEVEL

There is ONE platformer level and everybody in the world is playing it. Your turn has two halves and no clock in either of them. First you PLAY it — take as long as you like, die as often as you like, end the run when you say so. Then you CHANGE EXACTLY ONE BLOCK: add a platform, a spring, a spike, a blinking phase block, a key or a door — or take the CLEAR BLOCK tool and pull one of somebody else's blocks back out of the level. Your change is only accepted if a solver can still prove the level is finishable. It runs a breadth-first search over the exact same physics the game ticks with, from the spawn to the goal, and refuses anything that seals the exit, traps you, or turns the level into a plain walk. It tells you why, in your language, with nothing counting down, so you can simply try somewhere else. The caretaker baseline — the spawn, the goal and the ground the level stands on — can never be erased, so the level can never be emptied into nothing. When your turn ends you wait five minutes for the next one, and that wait is the best seat in the house: it plays you other builders' real recorded runs, replayed over the level exactly as it stands right now. Everything you are playing was put there by somebody, in order, inside the last sixty minutes. On the hour the level refreshes back to the caretaker baseline and it all begins again. · no timers — play as long as you like, build as long as you like · one change per turn, add or erase, and one turn every five minutes · six block types plus the clear tool; every change is provably fair · an hourly refresh, so nothing is ever finished · fully playable solo and offline; sign in to put your block on the world level · English and 中文, switchable mid-game · built for a phone, plays with touch, mouse or keyboard