I think there is a interesting idea but some elements did not make sense to me, especially the gun related gameplay. The enemies did not seem to shoot at me even though I was crossing their red line-of-sight, and my own gun was not having much of an effect either. Maybe I missed something, but I think focusing on the stealth aspect would make the gameplay more interesting (but also maybe more difficult to generate interesting maps for).
Speaking of, having generated maps was a really cool feature and it did make me replay through the game a few dozens of time to check out what it managed to create. The controls themselves did feel smooth so repeating it again and again was not really an issue for me, but longer levels would have been even more fun :-)