Just stubmled upon a small simple game based on
Irrlicht, it describes itself as "a 3D game that probably involves a lot of physics and frustrating gameplay" ;). Basically, you are controlling a glowing, rolling sphere through a level,
see for yourself in this youtube video. Nice: It's cross platform and open source, and the players avatar looks like how I would imagine an Irrlicht or will o' the wisp (
Irrlicht (wikipedia) - the german word where the Irrlicht Engine has its name from) looks like. It is written in or at least uses lua and includes several levels and a tutorial.
(further links:
project page hosted on google code, with downloads Big Screenshot,
related irrlicht engine forum entry).
Very nice game. Simple, fun and attractive.