Laser Gun

Ok so, some kid in my science class drank sulfuric acid. I don't know if there was some kind of chemical like uranium mixed with it, but he ended up turning into a zombie. Now it's turning everyone else into a zombie. I gotta find some way to survive, guess I can finally test out that gun thing I stole from the 90 million-dollar secret vault the military has. 

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Controls:

Space to start

Space to shoot (toggle)

E to spawn mini laser  (50 points)

Click the button for the upgrade