Nice take on tetras (aka fighting fish). The art style in this game is really great.
There are a lot of little details that made the game amazing...even the dial on the bubbles when loading into the water.
Was quite a bullet hell game. For me, I found the best strategy was to never move, so that my shots remained lined up with incoming bullets. The mechanics to pick up the drifting weapons and grab and use was interesting. For some reason, I don't think I could get 'R' (heal) button to work in exchange for goo I had accumulated.
This was a fast paced game that was fun to watch the 'fight'