I was going to make it multiple levels and make it more of a challenge with timing and some gimmicks like you said, but I got consumed by the scope and ended up scrapping everything and making one level.
I didn't have time to make any visual or audio changes, so I just slapped what I could as fast as I could in the last hour. I will try to give that some priority next time. One more lesson learned.
I'm trying to retrace the recording system to figure out why it acts up sometimes. I'll make it better.
Thanks a lot for the feedback! I'm glad you spent the time to do all this.
(Sorry for the late reply.)