Upgrade Complete

Shooting ,

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Description：
Note: This game looks terrible until you upgrade the graphics, it's intentional :D.
Here's a game for people who LOVE upgrade systems. Nearly EVERYTHING in the game can be upgraded, including Menu Buttons, Game Graphics, and loads more! You even have to buy your own mute button! Absurd!
How fast can you upgrade EVERYTHING?
Controls：
Arrow Keys / A and D to move,
Space to fire.
Menus are navigated by mouse.