As I have a very limited time this weekend, I went with the first idea that came to my mind - going deeper and deeper into the depths of the ocean. So there is a bathysphere going down to the unfathomable depths, killing everything dangerous with it's laser beam :-)

Yes, my plan was to work on the game mechanics during the weekend and then on the art on Monday, but I just can't do anything with placeholders. So I created my first pixel art ever and here's the result: