Good game, I think there should be instructions in the game, I thought it wasn't working until I realized I had to thow the bubbles at the snake.
Secondly im not sure if you can drown but sometimes theres a drowning sound being played but I think its just on the bombs.
and last there should be a way to exit while playing, IE pressing esc and the game pausing or just showing up a menu instead of having to just die to go back.