funny proportions are only ok if they are done right. Otherwise they are no longer funny, they become distracting from the point of having fun playing the game.

Your player has to get immersed in the game, if things look too strange he wont play.

Things must not always be perfect but they must be minimally acceptable. Unless of course you don't care if your game is just trash, then design it however you feel like regardless of what anyone thinks, noone will be playing it anyway. "you" is generally speaking of course...