Hey, just in case anyone else is looking for entries that are actual, bona fide Game Boy games, here are the ones I've found:
- Dashy no Witch
- Popcorn Caravan
- Unfinished Space
- Crypt of the Gameboydancer
- Patrick's Pocket Challenge (mine)
Hope I didn't miss any!
And if anyone wants to know more about Game Boy development, check out this list of resources!