awesome!!!!
man I remember a long time ago a couple of good games that got burned in my memory assault suit leyno, assault suit vlaken and metal warriors so yeah I freaking love this game you made. but some improvement is in order!!!
first you totally need a melee attack, like a punch or a machete attack or chainsaw or something.
second, rockets are a little too expensive, found myself saving to upgrade machinegun and armor.
third,a proper level with obstacles, dontknow a city , an undergrounds base something.
there is a really bad bug in I think it is level six and eight where sometimes you are not given the area cleared message, so you just stay there stuck with noting to do but to reset the game.
the shield is to powerfull , at the very least it should just defend the side you are fasing instead of becoming invincible everytime it is activated.
the concept is full of potential, hope you decide to release a more polished version in the near future.