It is insanely easy to think yer game is simpler than it is. Frankly I wish I had done more testing of the final section in particular (the Cave), but if you only dwell on what you wish you did I guess you'd get no where.
The glitch though - that was where when using a sword and running into a Reid with a predetermined path the game would lock up. I solved this by just having Harold step back if it happened, but in theory if there is a wall/object behind Harold the game would still lock up. Frankly I don't like my solution, but since my test player didn't get to the game finished til late (curse you real life) I was left with that as the quickest option that left the game mostly playable.
Glad you like the clickables. I was gonna have a lot more, but - yeah - like you said - time. They were my favorite part - I loved teasing Harold.