Actually, what really irked me was the storyline, after a certain point.
× Asking questions past the Gate of Firstity was hilarious ... as was asking the *correct* question of the Infohut. But after that, I completely lost track of what was going on:
The main antagonist, A1, who had all these great megalomanical speeches - even with, for a video game, deep philosophy - simply vanished. It didn't occur to me until actually beating the game that I had (probably) killed him along with the 255 Slayers. You think Beethro would've said something.
Finding a giant army there - where did they come from? Did I miss something (several somethings) exploring the City? Beethro seems to know what's up, but I sure don't.
The ... er ... last villian. Or main opponent anyway, the 'only one who might be able to stop Beethro.' ... Huh? On the plus side, I certainly didn't see that coming. But, even after the fact, I had no idea why he was there. Sure, he was protecting a secret ... I guess ... but it's not clear to the player why such a secret is so important to the Opponent (or to the Pit Thing. Or to the Empire. Or to Beethro.) Maybe the sequel will say?
Of course, it didn't help that my 3 least favorite puzzle elements - Builders, Stalwarts, and Insane Tar Puzzles - featured so strongly in the game around this point - maybe I'd be more charitable to the endgame story otherwise.
Not that I'm criticizing TCB itself - damn that was fun - but the last 15% or so nearly ruined it for me; I made it through the Goblin's Eye View within about 2 weeks, and it took me 3 more weeks to bring myself to reach Lowest Point ... although it was all worth it in the end, when I found the Theatre in the Undercity