Well, I gotta admit that the level design was a bit frustrating...
1. At tutorial, you made me push 4 blocks to teach me the pushing mechanics...
2. At level 1, I have to push the block and get a key... and then again... and then again... what are the keys for? Why to make this so... repetitive? And I didn't manage to push the blocks through the door to finish the level.
Besides that, the commands feel polished. But I think you could really work on level design!