Sorry your experience was ruined :(.
Which vines gave you trouble ? the dangling moving kind or the vine bridges you get swamped in ? (the non-moving vines shouldn't be an issue I think).
for the sound it was on the todo list but our inexperience with unity meant we had other priorities unfortunately. I (imj, dev#2, I'm borrowing the account) was against putting any more sounds unless we had a mute button working, and we just did not have the time.