I loved the theme and the innovative mechanics of the game. However, as someone who doesn't play a ton of platformers/ doesn't play on PC very often, I found some of the areas rather difficult and required extremely precise movement. I wish that the beginning would be a bit more beginner-friendly and progressively get more difficult. I also wish some of the mechanics were explained more in depth (I don't quite understand the purpose of the armor shell, for example).
Also, I encountered an error where the music stopped (not looping I guess?) -- but I really loved the music when it was playing! The art was also really great, and I loved the different designs on the crab! Overall, great work!