Addition of the birds made it bit more tricky :) It was a bit hard to see what happened when they moved so fast.
I would suggest to remove the dialog and rely on the already existing Select another level button and put the feedback text visible without player needing to dismiss it. This would allow for easier try again with Start and the player does probably want to run it again after success too because it runs so fast.
Being able to step through it or lower the BPM would be a nice addition.
Well done!