Bouncing from positioning yourself away from enemies to solving simple arithmetic to aiming at and shooting the closest guy to you, was very surprisingly engaging. Your eyes can only look at so much, so you end up darting them across the screen WHILE having to do math in your head. Very fun.
One thing I do gotta say though is the game spawns a lot of enemies, maybe a bit too much. It's very easy to get overwhelmed in the first minute or so, without using the forbidden tech at least.
Overall, well done! The forbidden technique definitely got a laugh out of me when I inputted the code :)