Thanks for the report! Version 1.0.2 is now on itch: it fixes the crash when pressing Q to go back to the title. On VirtualC64 it runs fine for me if I drag the .prg straight onto the emulator window, instead of putting it in Drive 8. Could you try that with 1.0.2 and let me know?
I’m using the latest version of VirtualC64 (Version 6.1 - 260901). It works only if I manually drag it to the “Memory” section. If I drop in in the “Drive 8” section it won’t work.
Other PRG files such as “Bubble Bobble - The Lost Caves” would work if dropped on both Drive 8 and Memory slots, so there’s definitely something strange either in the PRG decoding implementation of VC64 or in the PRG file itself.