Maybe this library can be useful for inspiration, there are plenty of games, demos, emulators implemented for pico/pico2 for devices with different screen size (320x240) and drivers (tft, hdmi, vga). I tried to load (ok, i was sure to fail) a uf2 file from it on pico2w, but uf2loader found it invalid.
The directories starting with ! are precompiled, the ones without the source code.