Red Maze (9.26) + Rubik's Cube (19.93)
Moving away from the old custom level speedruns, here are two levels that were released more recently. Both were created by Pokko, a newer member whose level building has really started to come into its own.
Red Maze is pretty straightforward, no real tricks. This wasn't my best run, and the level can easily go sub-9. The ultimate time was easy to reach, as it took only a few runs to find this path.
I am extremely happy with my Rubik's Cube run. It took me nearly TWO HOURS of recording to get a sub-20 second run. It's more difficult to reach than it may look; it requires extreme accuracy and precision, and good spin control in order to keep the marble's speed in check. As far as I know, this is the quickest path for the level, and the only one that is capable of getting sub-20. The ultimate time is impossible.
Song used:
Pound Sign (#?*!) - Kevin Fowler
Enjoy!