I'd like to give some feedback on this game, because it looks promising, but it's apparent that this is jam demo of a beginner project:
- Downloadable version is a Windows application, and, while it can be run on mac and linux using special software, it still should be labeled as Windows version
- Exit button in main menu should be removed or changed for web build, because it just freezes game while not exiting fullscreen automatically
- It's still not that clear what final game will be about, because demo is too short, so it's hard to give feedback on gameplay. If running from invaders is supposed to be important part - it's too simple if you know you can run and too hard if you haven't checked controls menu, but I think it can be used as tutorial on running if some text like "press Shift to run" is added.
Good luck with finishing the game!