I happen to know that some people find the puzzles in TSP a bit difficult. There’s a couple of Youtube walkthroughs available, but for those of you who prefer to read old fashioned god darn text, here’s a nice guide by user Traveltissues on Steam:
Of course, as a true adventure gamer myself, I would never stoop to consult a walkthrough. But if I did, I’d pick that one. It’s good.