Hi Great work , just a little bugreport or if I just understand it all wrong :) when you are game over it seems that Caveman for VIC20 is hanging just a simple tone and you cant press fire again at the title scene.
Iam running in VIC20 Emulator in VICE 3.9 with all memory enabled.
( It seems itch.io do not have any private message system )
Happy New year!