The music works well with the casual style of the game. Overall, the graphics looks good, and the ocean plant looks cool. The game has so much potential. Probably adding mechanism such as clearing debris, removing some ocean plant that gets in the way of the repair work or may be having the oxygen tank actually sinking down slowly and the player have to swim towards it before the sharks come damaging it could add some pressure to the player. Subnautica could be a good reference I think. But I think the game is really cool!