Yeah, I did tighten the timing requirements a little more than I intended from a difficulty perspective. Since you're directly influencing the music here by playing a note with the click (not just timing a click to match a note), it was sounding bad if the window was too large--like the note didn't belong in the music. I wanted every note that played to sound reasonable as a part of the music, so the timing had to tighten up a bit.
Thanks for playing, and I'm glad you enjoyed it! :)