Yeah I remember it well, though not very fondly on the Vic20.
I got it one Christmas, and the game didn't work at all.... Eventually played it on the C64, but that was it.
The Vic20 version should be around, probably in the TXZ Vault as a TAP file or something.
I used to like the Rabbit software stuff on the Vic 20 and C64... A very strange company, but something about their games, especially on the Vic 20.