That’s even better, the author is not against making an ARM build of the game based on the PC version. Can’t find the tweet, but he was considering to build a raspberry Pi version, and would be happy to test it on the Gameshell, but as it is not available, he can’t do it at the moment for the GameShell.
It’s a really good game. I have the cart on pre-order but I had to get the steam purchase just for the megadrive ROM. I completed it after a whole evening dedicated to it.