I had a lot of fun messing with it and I got stock at the 3rd (or was it 4th) level because for the love of the gods I can't find the exit and I accidentally drowned xd. Don't really feel liking doing all the box pushing all over again. That said, this is probably one of the better execution on the theme, a "bug" turned feature. And the puzzles are in fact enjoyable. I would love to have checkpoints or other similar mechanics so that I don't have to repeat everything if I somehow slip and fell. Other than that I have no complaint. Good stuff.