Bernard my beloved <3
I have to say, I'm not sure what the type of styling it is called but I really like how the negative space in the pixel art really sold that retro feel, and it pairs well with the music. I also really like how sprite animations syncs up with the music at different beats (Bernard's walk, the reef swaying, the fish swimming, etc.). In terms of aesthetic and game feel you guys absolutely nailed it!
In terms of difficulty I feel that it would be better if I can see just a bit more of the space around me, because a majority of my deaths doesn't feel like an issue of skill and more bad luck. Also, and this one is pretty nitpicky, but the way some of the shells aren't ideally orientated on Bernard (the mug, jar, and milk jugs kinda look like they're just lying on top)
Still, I enjoyed the game and I'm glad to have reunited our lil hermit crab with his family!