Having a Vic-20 back in 1980 was an adventure, I cant tell you the hours we spent trying in programs, and retyping them to make games. Thankfully these rom cartridges are not so hard, Just stick it in and play a game.
This game worked when last used, but that was at least 30 years ago, I don't have a Vic-20 to test it right now so I am selling these games as untested, if I find mine I'll test them all and prices will likely go up.
If you want more than one game message me and I can arrange a discount.