Software renderer is the best rendering system in my opinion. Original and fresh with great colours, although I still like Polymer that unfortunately doesn´t work on my computer, but runs well on my little brother´s laptop, so if he is off the computer, I can try it out.
I replied to this topic earlier this morning, but it seems to like it didn´t send it correctly, so I say shortly what I said: this looks great, just avoid monotous gameplay and environments and remember, add special sector effects - it prevents map falling to monotony. I´ve played your maps and many of them have this same problem.