In 2013, it was ported to the VIC-20 by ravenxau. He didn't bother to adjust the spacing for the VIC-20's narrower screen, so it's recommended that you run the FAT 40 extender beforehand so that the text wraps properly.
When you finish the VIC-20 game, you are told that the Club Library has more Don Lawson games. It is not clear whether Don Lawson is the author of the original C16/Plus 4 game or the C64 port. The latter seems likely as this game is very similar to Don's Elf Rescue.
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seems to be a bug in c64 version stopping the game ending even after completing all the tasks. Pretty basic game.