Don't forget that you have to drop the scorpion_dev.lha from inside the compressed file downloaded here, into your mini. Not the whole actual file obtained here. :)
I didn't make that mistake, what I did end up doing was start with a fresh USB. The mini didn't seem to pick up on the changes in the XML file, so I altered the settings in the menu manually and now the game runs at a great speed... though the character info menu at the top keeps glitching out. Though I heard that was a present bug anyhow. Very impressive, I can't wait till it's complete! That development engine must be really powerful!
Great to hear! Yeah the flicker in the score bar is only present in the mini and we're hoping for a fix. Try Lionheart or Aladdin on the mini, they got even more noticeable flicker. That's because they're all games that use the copper (coprocessor of the Amiga's chipset) a lot, which apparently brings the Amiberry implementation to its knees. It runs flicker-free in other devices or in the real Amiga, though.