Super awesome concept, and I love the art and music! The controls make sense, and there's a whole lot of content here. My main problem is that it's just too hard. There's not enough time to set up turrets and fighters before high-level mechs start coming in, so I never get access to all the features you implemented. I think having more time before the first wave and having the first few waves be lower level mechs would greatly improve the play experience. Nice work though! I would totally play a full release of this.