Beat the game after a few tries, while it's a solid concept and way more fun than I anticipated, getting sent back all the way to the start is a bit too punishing, especially on the last level where you spend your first few lives just finding out on how the level is even built before you are already sent back to the start and have to play through everything again. It was so fast that I basically just won by getting the mouse stuck in the wall, otherwise I would have had to play through the entire game a dozen more times.
Tl:dr While death in the later levels is too punishing and the game is generally too fast, it's quite a lot of of fun and once all the minor annoyances are ironed out can be a really great game!