Your mecha designs were super cool. The game loop seems solid except the enemies didn't seem to pose any threat if you just keep moving. There seemed to be some missing effects-- ie if you hit the frog-lookin' guys you get a nice impact sound effect and they animate as if getting hit, but that didnt seem to be in place for any other enemies. Anyway I love the totally unique visual design of this one and feel like it has a ton of promise.
The game ran super smooth even with a ton of enemies onscreen and the pathfinding for them seemed to work great so nicely done!