I think many people have problems running it on a modern computer. I was going to prepare a FreeDOS VM, hoping it would run better. But the GTA24 version is the best looking in my opinion, so you don’t really lose anything by playing that.
The 3DFX version looks too blurry for me.
I just tried the F11 menu, didn’t even know about it 🙂
I honestly don’t think the higher resolutions than 320×240 are worth it.
15-Bit color was quite common, even in the Windows era. It’s basically 16-Bit but with the same number of bits per color channel, which, I assume, makes it easier to program for.