I am ashamed to admit I went through this whole thing. I think the work of different artists appears, but notice on page 33 of the scan that "Doug Crane" signed this page. Crane was an animator as well as comic artist:
https://www.lambiek.net/artists/c/crane_doug.htmHe worked on Tippy Teen first, and later moved to Archie.
Interesting that this colouring book has rather more pages than the usual (like Tower's comics) and includes actual (probably reprinted) comic stories, not just the random one-pager drawings (although there are lots of those, too). Also, quite a few blank pages! "For the kids to draw their own stuff"--sure, that's what they're for.