It felt like staring into my younger self, one that sometimes would take control even later and made me create incredibly hard action levels... only mine were harder.
At first I had a lot of trouble with the circling boulders but then I found out it's basically a visual trick, you just have to see where the gap is larger and dart through. Then I was really weirded out when the red teleporter didn't take me anywhere.
When I found that one out, however, it was time to actually try the level "seriously" once I knew where everything was. And third time was the charm. I lucked out when I entered the purple TP and it was safe, but still.
The clock, however, was ridiculously mean.

23 seconds at the end.