This is one of the game using "limited space" by putting you in a limited space that works the better. I nearly felt claustrophobic in this dude's ear.
Tho the biggest flaw of the game is the character's movement, i couldnt get to understand how to move ? Also, the camera is always rotating and you dont really know where is your objective, what is ground and what is ceiling...
Its sad because the game looks reaaaally interesting... but even by trying to use my arm as lever and all i couldnt get myself to move as i intended to.
still an amazing works, especially with physics i think you had to work a LOT on them ! !