Thank you for playing and for the suggestions! The initial game (the one submitted for the GameOff2025 jam) had a tidal wave chasing you. But most of the comments mentioned that it was too difficult. So, this version includes Endless Mode, where there is constant pressure from the wave, and you play for the high score (which is local for the moment). The "normal mode" is more slow/casual. The intention is to have an option for casual players and for "action" players.
I agree that bumping into the crabs is more fun. I added some power-ups in the store that you can get with the seashells. For example, you can throw rocks using the "rock sandals" to kill crabs.
Thank you for the observation about the level selector screen. I am going to add an indicator or animation to show which level is next.