Fun horde mode + gotta love that title joke XD
The 3D models are cool, and i like both the mech and the enemy planes/tanks designs.
Gameplay wise the WASD + mouse aim combo works really well, and there's a good amount of weapon variety on offer.
If i had to nitpick i'd say the only small issues i had were the anti air missile aren't all that intuitive at first, cause the scan zone kinda looked like a shield to me, but it's not a big deal cause once you get what it actually is its easy to use and pretty fun at that, the other is a small readability issue, the laser color (the turquoise - ish looking one) is kinda hard to see against the ground's color so it makes it a bit difficult to see if you're hitting anything with this weapon.
But like i said more small nitpicks than anything ^^
The rest is pretty good and i can easily imagine a fuller version with small missions more enemy types etc...
Fun fact, you can fall out of the map O_o happened to me the first time i thought there'd be invisible walls at the edge of the arena but nope XD
Anyway, well done :)