you might have to leave the runtime folder, not the files in it, but the empty folder itself. Seems the games all have data directories relative to the runtime folder (../data instead of ./data) and you just need to be able to enter the directory.
Also, if it shows a splashscreen and freezes, add -nosplash for fxi and --nosplash for ufxi files! (the double dash for ufxi is important)
From my rudimentary testing I'm seeing a few bennugd games and a handful of ufxi games with issues still, some just need script changes. Others require a different version of the runtime, but it's hit and miss as to whether they segfault on me.
Gonna keep trying on figuring out some touchscreen stuffs for the moment though. It's one of the main reasons I'm trying this