At first I thought the game was too easy, but I got defeated on 19 wave, so maybe it wasn't so easy after all. I actually like how the difficulty rose gradually!
Your take on the glasses was original! When the object got announced I thought the only two ways you can do glasses was "seeing better", or "looking cool", and you went the third way! Very cool!
The game could use some more polish. Less floaty controls, a bit faster animations, more feedback on getting hit- that kind of things!