1. Yes, and also a 480p option too
2. Yes, but no auto save though...
3. Yes, an option for both digital control and analog control
A couple of things I didn't like about this release is that there's some slow down in the arcade Space Harrier during some of the boss battles (mostly during the bosses with two heads). I don't know if this happened in the arcade verison but it annoys the hell out of me. Also there's some sound emulation problems with Space Harrier SMS, Space Harrier 3D and Space Harrier 2. The sound in Space Harrier SMS, 3D, and 2 is quite low in volume too.
Main CPU : MC68000 x 2
Sound CPU : Z80
Sound chip : YM2151 + Custom PCM chip
Video resoution : 320 x 224