Great usage of the light theme! I love how the layered light patterns look overall and that your "weapons" are just different form of lights, which is quite a creative twist on the roguelike wave shooter genre.

I think the submarine and camera movement could feel a bit more smooth and "watery" and the different enemy types would need a bit more abilities to really impact gameplay, than just being faster or having more health. Maybe an enemy that absorbs certain lights would be nice? 

Overall a really creative execution of the theme - also, "Piu piu piu piu ........"

It is super sad the music turns off after a while playing, because for me the game ready established a fitting  atmosphere for underwater horror hunting :D The slow turning vehicle and small vision at the start really add to that. And when you collect more and more lights you get a strong sense of progress. This is awesome for a gamejam entry and I really enjoied the game!