This is absolutely terrible. You can't move while reloading (and he reloads every four bullets, meaning that moving in this game is close to a miracle), you can't get up from an attack without instantly being attacked a second time (because, you guessed it, you can't fucking move), you have to switch 5 (FIVE) times your gun if you encounter both a yellow and a purple (or blue, or whatever, the colors aren't even distinguisable) enemy (aaaand of course; you can't move while switching guns!!! :D).
Sorry for being harsh, but this is probably the worst shooter I've played on this website. Half a star because the graphics are good (such a waste).