In KPDR, the optimal strat for getting through Parlor at the end of the game on the way to Tourian is to Space Jump through the bomb blocks, but this variation is significantly easier, and only slightly slower.

Jump over the mound, use Space Jump to stay in the air, then morph into a Speedball on the far side of the pit. You can use the ceiling so that you can make the Space Jump a full jump.

Optimally, you will unmorph sooner than in the video, so you can open the door sooner.