That geometry has potential - will test it as soon as I can after work tonight. (With you, if you're online. G/F coming over later so might not get many games in.)
Did you make a
CONVEYOR for the belt which leads to Health and Electrogun? Could add CONVEYOR for the other belts as well, to give them a sound. The sound only comes from the central point, so might be worth using several shorter ones, like MultiSlayer Ship does. Making them join properly can be fiddly but worth it. Don't make them too short as the sound can get very loud!
Will you make this a heavily feature-packed level with scripting? If so, might be worth me making a
Tiny Face Off Arena variant of it... we'll see how it plays first though! (Would be like what I did with TTTA, after seeing your tiny version.)
(EDIT) Why the hell is this 2.6MB with a new
ste2.sty file? And you forgot to optimise the GMP, btw. The preview image alone is half a megabyte.

(EDIT2) More feedback, given mostly in Game Hunter already:
- Hole on approach to rockets, SE
- All respawns to be reviewed
- Hole in exit tunnel from South vehicle guns
- Invis is on a roof
- Traffic gets stuck in a few places
- A couple of 2-lane original roads are still 2-lane roads... maybe 1-lane would be too hard over the bridges and would make the small South loops seem more significant than they should and the long one across South would only go 1 way
- (44,194) is 90° but (44,203) is 45°
- You have to Flip certain tiles to make chequers tesselate in ste.sty
- Should (39,211) reach the floor or be removed? always looked like a bug in original
- Chequered yellow floor has no 1x1 variants, so may have to replace with normal yellow/green
- (27,212) can't be done properly... stupid ste.sty some bad mid-level white windows in beige wall just NE of there
- I'd tend to make (31,203) a lot less tall like, 1 block and 2 block high so you can molo over them a bit and makes the big buildings seem bigger even though they are actually smaller than Face Off originally architecture trick

- (34,217) hole in wall beneath bridge?
- (29,225) and (30,225) will look glitchy in-game, I should think.
- What will you do about (45,197)? I'd suggest ending that wall 1 block early.
This level has cheered me up; it's great for a v0.1! Just like your TTA. That's what inspired me to start making tiny originals. I've been making compact areas since... ever.
Bringing that to the originals always seemed like too much work for too little reward. Roads in tight levels was always a concern for me but careful use of traffic directions makes them play fine. Opening the editor and
just doing it, like Elypter has, lets us all see what gameplay is possible.
Tiny Face Off ArenaI'll make a quick arena-style script for this, which will refer to Elypter's files. He'll include it in a future version and maintain it after that. (Maybe with some tweaks from me as well.)
In 2012 I might make my own derivative of this, with more extensive changes. Much like TTTA and the very recently THSA developments.