I know this is the HE thread. But this game Mysterious Song was also put on this system by Rover so it's worth mentioning I think here.
I literally just beat ex mode on Mysterious Song. Tuesday August 29th 2:13am
All three characters were level 61. I farmed the dragons a bit on that dragon island.... Several hours.

The maze areas going through the different realities were definitely tough. Once I got to the dragon area part of it I was like dang..... Grinding time to get levels.
I did the entire treasure chest puzzle to get the Herr boss and cocophany was pretty hard at level 61. Fun fact... Marty Friedman was in a band called cocophany.
Anyways... Excellent game. People that play just the normal mode don't know what they are missing out on. And even the normal game is solid in presentation albeit a bit short for those not in the know about ex mode.
I just wanted to say thanks to Rover for bringing these games to us. Overall, all home brew people that are putting out games and translations for this system are simply amazing.