Use the arrow keys to move, and space to jump. If your frames per second is low, try moving the "resolution" slider up. This isn't quite a game yet, and it needs to be modified to sort objects by depth to display them in the right order, but it's getting there.
A modification of the previous version of the 3d Engine, but with quadrilaterals and sprites. [However, only parallelograms are supported in 3d] It is now easier to modify the project. Credit goes to Bad_Bill for the Goomba sprite.