Overall it looks good and is fun to play. 

i personally have a hard time fighting the sharks, because attacking means you basicaly have to swim into them and i hardly ever get out without taking multiple hits.

I think there are still some things that could use some work but otherwise i can see this becoming a good game.

I got a little disoriented when getting knocked back by enemies, but other than that I enjoyed the pixel art style and easy play style. Especially the sharks, they were cute in my opinion.

Simple and fun game . I like the underwater feel of the game  .It would be better to lower the launch character velocties when the shark hits the player as the bounciness can be disorienting