This game really hooked me.
Whenever I blew up, I’d immediately want to save up for an upgrade to make the gameplay more comfortable. I set a goal to save for headlights, putting oxygen and sonar out of my mind for a while. Once I bought the headlights, things got easier, but then I realized I needed to save for sonar and oxygen upgrades. However, after buying them, I felt the sense of progression was weak; I still couldn't dive very deep, remaining limited to the one or two diamonds available at the start.
The graphics are pleasing and well-crafted. The soundtrack changes depending on the stage, which is a nice touch. The gameplay concepts and design choices look interesting.