This was a pretty fun game, but the boxes were so bouncy and sensitive that it became very difficult to stack them into stairs and towers. It was also frustrating to fit them through gaps with a width of one block. Other than that, the mechanics of the game were pretty solid. I liked the puzzles in the game, but I feel like there could have been more variety to them; most of them were centered around building multiple staircases.
The background and the music were very simple and effective. I liked them a lot! The character of Amster also was designed well. My only problem with the visual aspect of the game is that the lava looked out of place next to all the black and white. Thank you for making this game, it was fun to play!