Sophie “GirlFlash” Houlden’s BoxGame is an interesting 3D perpective puzzle game.

As you get your character to fall through holes, jump over ledges and curves, the box perspective can change and turn.
A pretty interesting game that can make you a little dizzy!
There are 15 levels, some of which you’ll end up saying “I dunno how I completed this map”… happened to me sometimes even though I was able to finish them all. xD
Oh yeah, it uses the Unity plugin, which enables the 3D graphics. If you don’t have it, just follow the website instructions to install it… will require browser restart though.

Source: TIGSource