I made a simple to use 3D environment creator called Vertex Meadow: http://www.vertexmeadow.xyz/

It’s completely web-based and allows you to make 3D levels using a simple paint-program-like interface. You can also easily share your creations via URL (similar to Puzzlescript) or export for a standalone build.

Multiple levels can be strung together via link triggers.

I hope someone finds it useful! I’ll probably make something using it for the Jam.