When I started looking after this project for Squee and Rook, various sequences had already been finished, and they handed the files over to me. Someone had already done sequence 15, but I had trouble getting hold of them to secure their agreement to post it on YouTube. Hence Sequence 15 went back into the pool of unfinished bits, and Cowboys for Christ eventually composed some music for it.
However, the original contributor for sequence 15 has now been tracked down. And so with the agreement of Cowboys for Christ I'm going to use the original instead - its by someone called 'u', and it will be unveiled soon. The Cowboys for Christ version will continue to be available here as an alternative.