Hi @aaadddcom,
If you are trying to use McAirpos, it only works with MakeCode Arcade games on a Raspberry Pi or similar ARM SBCs.
Some attempts have been done and ideas exist to try to get them to run outside the browser simulator on PCs as well, but not sure how this has evolved lately.
Sources:
https://forum.makecode.com/t/makecode-arcade-on-raspberry-pi-including-retropie-recalbox-batocera-etc/14267
https://forum.makecode.com/t/play-makecode-arcade-game-in-app/10787/3
https://github.com/Vegz78/McAirpos