The US version of this doesn't have infinite continues, the maximum number using cheats seems to be 21. In comparison, the Japanese version allows infinite continues from Part II, which might actually be a good point to start.
This game runs at 60 FPS, actually slightly faster than the original game, which ran at 55 FPS.
completed the game (MiSTer).
I played through the first 'part' of the Japanese version of this excellent port of R-Type. I got an fun ending animation that I never saw before, and a code: BDA-7638-NB. No idea what that's for. I should probably play the US version that isn't split into two cards.