On the first level, you shouldn't have made it, that the boxes, when pushed together, there was no way to get them to unstuck. I had to restart the game because of this.
This is what I mean, I can't unstuck the boxes, and talking about that, I can't push the most left box right, anymore lol.
The game have a higher difficulty than I expected but I also think it is fair as far as I played. Is not like too difficult that is impossible finish the level.
The graphics are pretty good and the music fits the game to a T.