I like the concept though I'm not a fan of the box push only kind of puzzle games, its very prone to failure from the player's side if not careful and will be forced to restart the level. Honestly though this game either needs pulling or an undo mechanic, I would spend so much time setting up a solution only to notice that I didn't give enough space for my character to grow and push the bigger boxes.
I took my time solving the puzzles and it was genuinely fun, its just the moment I restarted the third time in the first big blocks level that I had to stop cause too much time was spent, thank you for making this game.