This is great! I've played about a dozen games with this and they run perfectly.
I have noticed a couple of bugs for certain carts on my RG350M where behaviour is different than on the Pico-8. I don't know if you want to go through the trouble of playing these games to reproduce the bugs, but I'll report them anyway:
Dank Tomb: After finding a save point, if you quit the game and launch the cart again, it does not load properly. The items are glitched out in the bottom of the screen. (Save point is a bit of a ways into the game, at some point it will tell you it saved progress.)
Mystic Realm Dizzy: When talking to a character, the text does not display/wrap properly. The closest character that demonstrates the bug is to the left of the starting point on the other side of the water and past the bees.
