@REK607 oh, was there another version of it? I had actually bought both of these on Steam in the past, but I assumed they'd be the same.
I do love Micro Mages, and the PICO-8 also has a fair bit of fun games there which, if it'd help, I could gladly put together a list for. I just never saw a lot of interest in it around here - which, to be fair, isn't surprising given that it's quite niche :)
If you are using the controller wired, it is probably in X-Input mode. Try uninstalling and reinstalling the xpad driver through RetroPie-Setup -> Manage Packages -> Manage Drivers, then rebooting the Pi once you are done.
@shavecat I have never tried those two games. But I noticed big performance boost after I overclocked my PI. I have GoldenEye installed, but never played jet. Maybe I will try it today and let you know.