5/5 - although, a single complaint: too much stuff is happening on-screen. Eye-candy, yes, but confusing. Maybe removing money as pickups (just award them directly) would solve this issue.
Looks like you get shields for completing achievements - however, when you start a game as undead and complete achievements, the shields do not carry over to another race, even though the achievements are still completed.
This seems unfinished. It's more a demo of graphics and upgrade system, but no story, no victory screen(!), and no gameplay other than grinding. Though it shows good promise, it's just not a finished game.
In this comment, I am watching the positive aspects and your love for the game. Though our views don't see like you are saying and each game has room for improvements. Keep your trust on us, with the time we will work more to improve it a lot.
When you get a book, it is presented as being equippable by "nobody", and that you should keep playing. This text should be changed, since it can be equipped by the main character.
 "Root your way"){kind=icon}
 "Wasted Colony"){kind=icon}
 "Zombotron 2"){kind=icon}
 "Endless War 5"){kind=icon}
 "GARE"){kind=icon}
 "Reactance 2"){kind=icon}
 "King's Game"){kind=icon}
 "Notebook Wars 3"){kind=icon}
 "Utopian Mining"){kind=icon}
 "Battle for Gliese"){kind=icon}
 "Zombie Madness"){kind=icon}
 "Epic Stand"){kind=icon}
 "Starmada"){kind=icon}
 "Necronator 2"){kind=icon}
 "Sky Defender: Joe's Story"){kind=icon}
 "Defender's Quest (lengthy!) Demo"){kind=icon}
 "Super Defence"){kind=icon}
 "Red Planet"){kind=icon}
Damn i wish i was that good.