I honestly liked playing this game! Two things: (1) the stars in yhe background are too bright, sometimes they make the game hard to read. Try reducing the contrast? (2) I ended up losing because there where too much objects to display on screen. The game started to lag and my fps dropped drastically. I died without knowing how or why.
I like the evolution, becoming stronger as the game goes. I like the one-button concept. I like the art.