Solid Game. Pretty fun physics and idea. But when u place a block through a player while he is in contact with the floor and the block is placed on his upper portion, he just phases through the floor :), Other than that, W game!
Valve used an immense amount of playtesters during the creation of portal to ensure the game was fun and bug free. I reckon they could have instead had you for ten minutes and made an even better game. Anyway, thank you for playing my game.