Just a few minor changes. Added a restart button to the high score page instead of main menu. The Reload was just being lazy so I took the time to reset all the variables and group activated properties on the start of the layout so now you can restart quickly :).
Great game, I remember moon patrol, 10p a game in them days. Please make the high score tutorial, I am just posting the score with the browser object but there are a few problems with that method. Nice game thanks
Anyway, far as I remember the hole is just a sprite with the bullet behavior and it's speed matches the speed of the ground. It's created when the missile collides with the ground. In the game, the backgrounds and ground are actually moving with Bullet, not the player.