I'm a big fan of the pistol shrimp, and this little metroidvania. I got far enough to get a double jump, but the lack of a checkpoint made restarting a little painful. I'm not sure if it was the closeness of the hitbox, or the bubbles distracting me, but I never felt confident about punching and not getting hurt. Pressing the E key while using WASD was challenging as well. I really liked the main character, the crying animation, and the snail shell guys. I found it all quite easy to understand
Here's a playtest!