nice mix of classic arcade feel on a modern landscape. Could be made into a very fun twin stick game with some extra development. I'd particularly like to see a little more of the terrain and feel more power from the weapon (taller characters so the shots don't get intercepted by terrain as easily?). Of course you'd want waves of different enemies and powerups and stuff, but I think that in terms of mechanics, a camera more overhead and maybe a button to make the world semi-transparent to see enemies/powerups would build a stronger foundation. Thanks for sharing it!