Hi there! Sorry about the problem.
For playing with a DS4 controller on Windows, I recommend using DS4Windows -- http://ds4windows.com. Let me know if that works. If not, I can try uploading a different build.
itch.io's exclusive content features are still under maintenance: https://twitter.com/itchio/status/7326445768302264...
For the time being, the soundtrack is an added bonus for all .
UPDATE: itch.io is doing some maintenance on the system. I'll get the soundtrack to you when they update me. https://twitter.com/itchio/status/732644576830226432
ORIGINAL POST: Hey there. Thanks for heads up. It looks like I didn't set it up correctly. I'm working on it, and I will send it over ASAP.
Sorry for inconvenience!