It was pretty fun.
I wish there was an indicator that you're supposed to go through the warehouse door so you don't waste time and ammo on the other parts of the map. The grunts feel like they take way too many shots to kill (unless I was just missing most of my shots... it's hard to tell because there's no indicator when you hit someone).
I wasn't able to beat the boss because I ran out of ammo, and there weren't any ammo pickups left in the map (that I could find)... I guess that's life. The sound effects are nice, and I like the bug-head character designs!