Mechanics

At first, each room looks like a simple platform puzzle: a player, a locked path, and a problem that seems to require being in two places at once. But rewinding time does not reset the room. Instead, the action you just performed is preserved as an Echo — a visible replay of your past self.

In the showcase below, the player first records an action, then rewinds it into an Echo. That Echo can hold part of the room's solution while the current player takes a new path. The puzzle is solved not by moving faster, but by turning a past action into something the present can cooperate with.

In this game, rewinding time does not ask the player to "fix" one perfect timeline. Instead, each completed action can become a committed piece of history.

Once an action is recorded, it is no longer a promise the player must fulfil later. It becomes an Echo: a replay of something that has already happened. When the player returns and acts differently, they are not breaking the past — they are creating a new branch beside it.

That is why paradoxes do not become the focus of the game. The puzzle is not about proving one timeline self-consistent. It is about learning how to place useful pieces of history into the room.