Here are some of my thoughts.
What I liked:
- I haven't seen a game with this kind of theming before, and its creative concept really makes it stand out from the crowd.
- The idea of using collectible items as "lives" is brilliant, and really encourages exploration as well as carefulness.
- The game is instantly understandable and accessible, while still being complex enough to be interesting.
What I feel could be improved:
- The game doesn't really get "harder" as much as it gets "bigger." By the third level, you're in an outright maze, and it doesn't feel any more challenging than the previous two levels. In fact, the enemies are more spread out, so it's easier! Instead, it's just so big that you're taking forever to even find one test answer, and it feels kind of sluggish and uneventful because of that.
- Sometimes I'd get stuck on the wall.
Overall, it's a decently fun game with a really cool concept, but it's lacking in natural difficulty progression.