Yeah, those were just test rooms with simple crap.. In the next demo, I've got more weapons, a turret, explosive barrels, and more. I also know you can change the icon, but game makers worry about that stuff lastly.
They don't go down, just go through them. I'll try and add skipping them next demo. Anyway, for the next, collisions have been fixed, and the randomly 'not able to shoot' glitch is fixed, also.