This might be because they're using the AROS Kickstart (because it's free) and not the original Commodore Kickstart. (because you can still buy it and so it cannot be distributed)

LOL, I saw this news last night and thought I read "AMOS" instead of "AROS"... so I thought the game I checked was running a crackintro (written in AMOS?!?). Anyways, you are right; this is actually a great usecase and opportunity to improve AROS as kickstart.

#jsmess on EFnet IRC if you'd like to talk with the developers

+ all the screenshots appear to be captured in an automated fashion. I browsed ~20 tiutles and havent found one correct screenshot, everything shows emulator window starting a game instead of actual game.

The script captures multiple screenshots over a few minutes, discards duplicates, then sets the one that has the largest filesize as the default.

This doesn't always result in the nicest screenshot being the default :) Some manual intervention is generally required, and that hasn't happened yet.

We have a small handful of alternate configurations, such as an A1200, ready to hand. However, we still have to go through and find out which items need to use them; it's hard to automate that. Screenshotting is the first step in that process, since it's then pretty easy to see which ones have problems.

I would recommend looking at the emulator platforms, specifically RetroPie and CoinOPs - if you find the right Distro, those seem to come with a lot of pre-built UAE configs you could adapt.