This is a cool game :) I loved the concept and really good job on all the polish! I also liked how it was well-taught: There was no need for a hand-holdy tutorial because every mechanic got introduced gradually. I was also impressed with the ammount of content, quite a lot for a jam game! In terms of things to improve: I found the font a little difficult to read and perhaps you get a little too powerful towards the end with all the upgrades. Really good job overall though :)