Not bad, just boring
Gameplay is definitely solid, and I didn't have any trouble understanding it. Mostly... I don't know. The fish spawn and move slowly, and your sub is invulnerable so there's never any real sense of threat, at least in the early levels. But at the same time, the weapon fires slow and doesn't feel very powerful, and the fact that coins block your shot becomes maddening when a whole group spawns from one side.