Swipe to move. Every self obeys the same swipe at once - TRY being the important word. Hold a direction to keep walking.
Push the boxes onto the diamond targets. Cover every target and the level is solved; match the optimal count for a star ★.
The framed window is this same level, live. Doors lead into and out of it - one world, seen at every size.
Two selves meeting through a door merge into one. Pits swallow whatever falls in.
Undo is generous: tap for one step back, hold to rewind. Reset starts the level over.
Just for fun: tap a window to dive in, poke a self to make it wriggle, long-press the board to climb out a level.
Keyboard: arrows or WASD move (and browse the menus), Z undoes, R resets, Enter advances, Escape backs out.