It's finally here, I finished the Donald TAS today and uploaded it. Check out the description for a little more info. Sadly didn't find anything new and the sub 15 is barely impossible since the TAS gets a 15:04.

And no, I'm not making a Co-Op TAS, that would be hell

Yeah co-op sounds like torture. Did you try extending the piano jumps by avoiding the cloud and landing on the lower keyboard? Donald has already slowed down quite a bit so it might not make any difference.

This could also save some time:

Yes, I tried to avoid the cloud but I would overshoot the lower piano and fall, it's probably possible to do that jump though. Nice find with that boost!