hey, your idea is pretty funny but your game still needs a lot of work. textures are way too dark. some gfx have no smooth edges. just one friendly word of advise. dont put a "buy this" mark in your game as long as you use other ressources that you dont have copyright or license for. especially sounds, fonts, bitmaps, maps!... you could get into big trouble for this, no matter if you ever sold a single unit.

however, polish this idea up and it can be a funny game. good luck with it!