Without actually looking into it, I could see how playing as a 2 year old could be somewhat odd and probably frustrating. I see it going like this:
*Pressing W to go forward* "Oh crap, cant walk in a straight line *struggling to hold balance and keep self on straight course*
*BLAM* "Aww man I just clipped the corner on that table, where the hell did that come from?"
*Pressing buttons frantically with nothing happening, character on floor crying like their arm fell off*
*Watch mother character come and pick me up, keyboard controls not doing anything*
In all honesty that's how I would envision a first person game through the eyes f a 2 year old, but I will have to check the game out, it certainly sounds different
EDIT: So I took a look, and it does look interesting, will probably check out the alpha version just to see what its like as a game