Great game! I had a lot of fun! Music is really well matched (from anime?)
First I died fast but I tried again and again. Finally I won the whole game :D
I really like this "grap" mechanic is really fun to see how you eating everything around you :D
Great upgrade mechanic, it always work good, here as well. Background is really good, make nice atmosphere of the game.
To improve I think some small tutorial, I did died fast at first play. There could be problem for someone who doesn't want to put some time to understand the game. Second think is to make game more challenging in later part, I had some feeling that I cannot loose but just pressing one move button.
Overall great job and congratulations on your submission!