I'm using a z80 version of the game. I am able to start R-Type and Zaxxon both with no crashing. The only crashing comes if you start a second ROM, like we had before. I don't know why that problem is present in FUSE, but not the others. I noticed there are a lot of options though once you start a ROM up. If you go to options in the quick menu, you can change the type of Sinclair it is, like Sinclair 48k, Sinclair 128k, etc. Also, if you go into controls, there are settings for different types of joysticks. I tried a bunch of configs though, but I can't get any game to start, and when opening the keyboard overlay with the MINUS key, it doesn't register the key press or something. Maybe someone else can play around and get something to work, but the only crashes I had, was when I started a ROM a second time.