Cool classic sidescroller style.
I also liked the fact that you can hop into the mech and that if it gets destroy you can try to continue on foot to see how long you can survive, the game also has a lot of feedback with thar screenshake ^^
One thing i found a bit difficult was that you don't seem to have any i-frames when hit so enemies can drain your health pretty quickly, plus the fact that if you let a single enemy get in melee range, you can't seem to outrun them to get back enough distance to shoot them, this means anytime one gets too close it's game over :(
Other than that i still liked it and it was fun to stomp around shooting the zombie horde and see how long i could last :)