It's emulators all the way down (emulator is https://macintoshgarden.org/apps/silhouette, a Nintendo-internal SNES emulator for PPC)
Super Metroid! I couldn't skip the intro and this emulator doesn't seem to properly blank the screen, so unless something's drawn to it it stays white, but everything that does get drawn looks great
Huh, Mode 7 seems to work in Metroid