Thanks for playing! I just saw the VOD of your stream. You were pretty close to the end, getting through the castle door is the last thing in the demo. I'll probably go back and try to make some of the items in that area a bit clearer.
The mouse wheel rollback was default with Ren'Py, but I didn't realize it would affect the music as well; I'll just disable it. Thanks for commenting, and for the stream! Seeing a playthrough definitely helped me notice a few more things I can probably make better.