This is a program that my dad and I made to walk around in a 3D world. You can edit the world to add and delete boxes. It is infinitly large.
It is written using processing language, which is a kind of Java.
When you are walking, the controls are:
| w | walk forward |
| s | walk backward |
| a | walk left |
| d | walk right |
To edit the world you press 'm'. This will show you a top view of the surrounding area.