There is a secret level that can be reached from the Asteroid Field in Level 3. Getting there requires destroying the second of two large asteroids and then flying straight into the bird that appears. Doing so results in being transported to "Out of this Dimension" where the background is warped, the enemies appear to be floating pieces of paper, and the boss is a giant slot machine. Once defeated by getting three 7s, the end credits roll and the player is stuck in this level until the game is reset.