Hi - we're happy to hear you liked the demo so far!
Some of the decorative pieces are foreground and others are background - we're still fine-tuning which enemies should be allowed to hide in the clutter and which ones should not.
We've had mixed responses on the gun buddies being wall-sniffing dogs, but a lot of players who have trouble seeing the differences between normal walls and shootable walls have found them useful for the task. We'll probably put wall detection behind an upgrade in the future.
Thanks for giving the demo a try!