Thanks for sharing new version.
Mouse support is - as you described it - experimental. I've tried to play Railroad Tycoon II and it is unplayable at this moment - mouse position showed at screen is not actual position seen by the game (so you can't just click a button). This problem not exists in Quake II (which
@Jokippo has testes), where important thing is mouse movement, not a real position.
There is also a regression in Vib-Ribbon (I'm using CHD wihtout LZMA, but I thing this is not a problem, because it used to work in earlier versions) - after selecting "Play" and before selecting game mode (Vib-Ribbon CD, custom CD) game hangs, and controller stop to response. You can come back to main menu by pressing reset button on console. Another thing that happens is unmounting (?) USB drive - it becomes unaccessible. I tried to copy CHD file to my laptop to check if it is not a problem with USB hard drive and it copied well.