WOO! GO ME! YAHOO!
Sonic Team Junior
Here you go, a neat Zip with srb2balldd.exe and r_opengl.dll: [LINK] Disclaimer: I didn't test it. Maybe direct-draw was left out on purpose because slopes might not render? Note that the Zip will be removed from the site in 48-ish hours.
Make sure to click the cyan-blue download button beneath the "uploaded on, accessible until, downloads [number]" info, not one of the ads. (If you have adblock, don't worry about the ads.) My usual ad-free file-sharing service is being finnicky, so I couldn't upload it there.
Also, I compiled it off from the "exact commit SHA" in the opening post, so it should be fully netgame compatible and stuff with the SDL2 build (I think), but you'll still need the files in the Zip from the opening post of this thread.
We could just setup Appveyor to build the EXE and when some tags a commit for release, it will upload the zip of the EXE to Github's release, so release will have both the source code tar.gz/zip but also a Windows EXE to go with it.....