Ok, so you're ready to rump. Rumping is not for the faint-hearted; nothing is finished, everything is subject to change. I don't think typing into virtual screens is a particularly ideal way to code in VR : ). But it's still a heck of a good time and you'll probably have some fun.
* Higher-level "VR native" languages are underway, but I wanted a development environment and "assembly language" first, and Rumpus is a snapshot of that process.
When you boot up Rumpus you'll be in the Scene Loader. Choose one of the orbs around you to visit that world.
Pick up objects by grabbing them with the trigger. Hold the grip buttons to bring up the Teleport Beam - point it at platforms and release when it turns green and starts to rumble to teleport to that location.
Press and hold the "App Button" (above the touchpad on your Vive controller) on one hand to bring up the Object Bouquet. Pull objects out of the bouquet with your other hand to bring them into the world. To destroy an object, drag it into the center of the Bouquet and release.
You can import objects from other scenes by pressing "Import", then choosing a scene, then grabbing one of its objects. It will be copied into your scene so you're free to modify it without changing the original.
To return to the Scene Loader, click the green orb that appears at the bottom of the wand when holding the App Button with your other hand.
You can create your own scene by clicking the "New Scene" orb in the Scene Loader. Scenes are persistent, so you can build arrangements and revist them later.
To learn to edit and create your own objects, see the Rumpus Programming Guide.