I loved how you matched the obstacles to the music. Its very cool to play. I also liked how as your health drops (lose swarm members) its easier to dodge obstacles. I lost all but 1 in the interlaced gaps section (around 5,000 points) and kept going till just after the music loop starts again.

The level design is really cool!

I liked the increasing difficulty!

Suggestion: the first two bars are easy to avoid but you don't know how unless you get hurt a couple of times and it's a bit confusing for a first time player