✦ push every crate onto a target - in four dimensions. each board is one slice of a 4D room. the arrow keys move you between them. ✦ controls click the stage first so it can hear your keys. W A S D - walk inside a board arrow keys - step to the next board Z - undo R - restart P - pause space - select ✦ tips the faint marks show where you'd land on every other board. line them up to push a crate across. undo is free. try to beat par. ? sound on