I like the sprite work! Simple yet effective. Gameplay-wise, I like the ramp up in difficulty through both timing and number of places to check. Couple small bugs I noticed on the web export if you feel like working on this more post-jam:
- The progress tracking dots on the bottom of the screen stopped working after reaching the first diamond; the later diamonds would fill in after enough levels but the smaller dots between the diamonds never did
- Resuming the game after game over had some weird behavior. Most notably, sometimes I would get a game over after a single guess despite having 3 hearts left