Hi, just some feedback. It seems my download had picked up some corruption. It's working on my Miyoo Mini now - and with rumble too!
I'm also lucky enough to own an EZ Flash Definitive Edition and rumble working wonderfully on there with my Gameboy Micro as well. I think the Micro with rumble is going to be the way I go for my first play-though. I love that device and playing such a well made new GBA game on it in 2023 is beyond a treat!