blox

as others said. Movemend on the grid is little more tricky to do. (but not too difficult) and would help this game a lot. Or at least place tags on the grid and when the object is released teleport (position and orientation) to the tag.

Level 3 and 4 are more easy than 1 & 2 :P great simple puzzel

Is there a way you might restrict the movement of a block to a single axis while grabed?
Can be awkward, great game!