Here's a build with the Gels to play with. (DK2 Required / Leap Motion, Bluetooth Controller, and Nod Ring supported)
I spent some time today and fixed up the stability issues on the space gel. I also spent some time with different shaders and physical properties, including a reflective/refractive one, very cool.
Movement: WASD /Arrows/Left Joystick
Rotate View: Mouse/Right Joystick
Look/Positional Track: Oculus DK2
Speed Up/Slow Down Time: +/-
Change Time of Day for Earth: Mousewheel
Also, had a request for a non Oculus/Leap version, so here it is, but note that pales in comparison to the experience with the Oculus and Leap: