This is a really clever idea and I had a lot of fun with it! I think there were a good amount of levels and they were appropriately challenging. I am also a fan of the sound effects and visuals. Really nice work! If I were to change anything, music a restart key would be good, but I realize those have already been mentioned. Knowing in advance that all opposing sides of a die add up to seven was really helpful and made the puzzles more enjoyable. Possibly, informing players who aren't familiar with that detail could help more people enjoy your game. 😁