Thanks, for your comments (all good ones).
Bullets/minute: The different weapons do fire at different rates, but that does seem to get lost in the onslaught (the slowest firer has the smallest bullets. He also fires faster than he should (my mess-up)) So, I should adjust all the firing speeds down (& maybe bullet speeds). Originally, the player was going to change weapons (start with slow/small and work up) but that got cut and he ended up with the fastest.
Walls got cut, as I ran out of time to write the line-of-sight code.
Pauses for reloading (even if infinite ammo) & item (guns/ammo/buffs/etc) pickup are now on my future to-do list.
Thanks!