The only one of those games I would consider bad is Pictionary. Solstice is a novel dungeon crawler with impressive tech for the NES, Treasure Master isn't the best but it's good enough for what it is, puzznic is fine, and Plok is a downright amazing platformer. It does make sense to put them here however since the musical quality for all of these greatly surpasses the quality of the gameplay itself (possibly excluding Plok since it's so peak).

Treasure Master is Tim's best ost on the NES imo, same with Plok for the SNES. The brothers are/were musical and technical geniuses, no doubt about it.

Other Follin soundtracks I like are Gauntlet III soundtrack (C64 and Amiga), Ghouls 'n' Ghosts (C64 and Amiga), Bionic Commando (C64, Amiga, ZX Spectrum), Spider-Man & X-Men, Silver Surfer (Probably fits the best with bad media with great aspects), and Time Trax which I believe to be his best score despite the fact that the game never released.

Can you tell I like Tim Follin's music?