I have no idea where I'm going with this or if I'm truly going to finish it:
@hamst3r: looks like it could be a pretty fun little arena that you've created. What's that platform / swing / lift thing for? And maybe some border definition between the building and the sand? Kind of looks floating-ish, if you understand where I'm coming from.
@peri: very interesting. I'd like to see where this is heading
@kokos: I like the blue and red bits of the lighting, but the yellow lighting should definitely be rethought. It looks too, well, yellow. Perhaps a darker shade, verging on orange, or a lighter one, on the white side. But I like what you've got started.