Wow, this game is really great! It deserves more reviews, i instantly added it to my collection. But there are still a few things that i would change:
1. Add music! You probably didn't have time for that, but if you plan to continue working on this game, music makes a game so much better!
2. The graphics are great, but the wall doesn't really fit into the rest of the artstyle.
3. The aiming is fun because it isn't too easy, but maybe make a bigger projectile or spread-shot upgrade instead of faster shooting.
4. Make the UI more visible. It looks great, but i didn't see the options for uprgading your character at first!
5. I don't know if you keep yourmoney of the previous day, but the game felt a bit slow in progression (or maybe my strategy was just bad XD)
And finally, make a better cover so more people click on this great submission!
I hope my feedback helped you a bit, and if you have time, it would be nice if you could check out our submission too. Thanks! :)