I believe that the simpler the video game design is the better the game will be.  The Pen-Space Bar Video Game is designed to only use one key, the space bar, to navigate Oscar the Penguin through blocks of ice under the Arctic sea.  There is no score or time limit.   Also, I don't like to hurt virtual penguins (awwww .... ) so there is no limit of times you can fail a level.  Just make Oscar swim and make him