Very cool idea on the micro world theme! It kind of feels like a cool twist on agar.io
I wasn't very good but I think that's a me problem haha.
Your sound design was very good. I really liked the feedback that I got in game as well as the music.
My main feedback is that your menu and leaderboards UIs had a very polished look that matches the style of your game. I just wish that the in game UI elements had that look. It was unclear to me at the beginning what each meter was supposed to represent and it took some time to figure it out. I think adding some extra info to the meters like simple text or just an icon could really improve the learning curve.
Very cool idea and well done!