Unblock Cube 3D

Each small cube in this stack has an arrow stamped on it, and tapping a cube sends it sliding off the play area in that direction — but only if nothing's in its way. Working out which cube needs to move first, before the ones blocking it, is the whole puzzle, and the 3D view means you're checking angles you wouldn't have to in a flat version. Some layers hide their blockers behind others, so a level that looks solved from the front can still have pieces stuck underneath.