gameos, born on this chip family, running its own real engine: core.c, gfx.c, input.c and both games compiled unmodified against a thin compat shim, its indexed-framebuffer present pass repainted 28 rows at a time on a device with no framebuffer.
No prebuilt image for this port yet. The pack's firmware and this page's flasher both work; build this port's image with the pack's own tools/build-native.ts and it appears here.