The additional options you've smacked into this MMM is pretty incredible.
I don't feel the motivation to write a full review, but I will point out one thing that seriously needs work: Enemy spawn positions. Rarely, I would hear a bunch of collisions just when the scenario starts, and on wave 28 (where you first find the "velocity damping" enemies) there was a series of nukes, shockwaves and whatnot for about 30 seconds until one of those special tanks came rocketing out at a billion mph and pwning me. It was hilarious, but really stupid way to die.
Oh yeah, changing the black shot from random into a mobile magnet was pretty awesome xD