For a while I was progressing without really learning how to play the game, once I was actually doing THE THING and if felt epic it was over after two more gos, so that was a bit unfortunate :O
Also I was totally just clicking the upgrades at random since I could often afford many of them so the choice didn't seem so meaninful. I would have also loved to be able to look ahead more to see whats coming. maybe the character should be more left on the screen or maybe a little preview of the lvl would help?
Now that all sounds terribly critical, but actually I did have fun and I love the look of the game a lot! Seems like things that can be polished easily cause you already did all the hard work :)! Good job!