The physics are a little approximative, i hated whan blocks pass trought wall, but in the other hand sometimes i passes stright trought the laser, so i think it's still reasonable fair.
The game is pretty entertaining, in the "normal" playtrought, but i was expecting a little more from the core feature of the game, the "give up button", some from the straightforward:
"You ended the game, you lose, the objective was to give up."
To more complex and subtle ways to make me really feel the regret for not ending the game...