Ahh I see. Well, as much of the code is undeveloped, the technical specifics are rather lax at this point. However, I can address all of the examples you gave
likely, both (UDP for in-game, TCP for connectivity)
single-threaded client
both fixed function and vertex shaders (min vs1_3). no pixel shaders.
engine, renderer, networking, etc, all statically linked
collision detection on a very grainy basis--no model-based detection, 2d collisions only on the flat plane (circle, box)
flat files
depends
Hmm...more specifics?
Platform: Win32
Target OS: Windows XP
Graphics: DirectX 9.0c
Audio: OGG-Vorbis
Input: Win32 (yup, you heard me)
Network: Winsock...bleh
Karl