You probably know better than I how so many fascinating little games for the PC-98 are floating about online....!
No small nostalgia from the early through mid-'90s is associated with F-Zero, which I played exhaustively alone and with friends, though never esp. well. Thanks for reminding me of Psychedelia and Hangovers, which I should finally sample....
I've collected many good, cheesy SDL-based clones of great, cheesier Win3 games. Jewel Thief is one among maybe a dozen that still deserves an improved clone.* Clock Tower is really fun; I chanced on its ROM a few years ago and I was very impressed. For fans of Argento's flicks in the '80s and their Japanese pastiches (Evil Dead Trap, Sweet Home, etc.). it's esp. enjoyable.
*It may exist; I don't know. lol