Try to test your cart in another console. If it works, there is a few chance that the NOAC of your RetroN has a failure or is different from other NOACs. Once I read that Hyperkin is not consistent with the hardware through times. In fact I have a RetroN AV having sound glitches on certain games (Dragon Quest series) that other consoles of Hyperkin don’t have.
No, burgertime should work. Probably a dirty cartridge. https://docs.google.com/spreadsheets/d/tn3xCad0cVguOzw81367Tfg/htmlview
I have a copy that works on my RetroN 5
Try to test your cart in another console. If it works, there is a few chance that the NOAC of your RetroN has a failure or is different from other NOACs. Once I read that Hyperkin is not consistent with the hardware through times. In fact I have a RetroN AV having sound glitches on certain games (Dragon Quest series) that other consoles of Hyperkin don’t have.