Hello! Thanks for testing! Unfortunately, the build uploaded contains a critical memory issue that is fixed now in this version: shorturl.at/vUWY2 I don't have a PSP, so I had took a little more time to figure out what was happening.
It's now playable on PSP >2000 and PPSSPP.
Thanks again!
Edit: a PSP1000 version is available too: shorturl.at/GHJNX