Game Maker – Space Invaders

I made a very basic Space Invaders game in Game Maker. It only has three objects, the bear which is the shooter, the ghosts which are the enemies, and the bullet which is just a basic round thing that destroys the ghosts. I added a coloured background and an interesting formation of ghosts to make the game more visually effective. The bullet doesn't get destroyed when it hits a ghost so it is possible to take out several ghosts with one shot.

I found the task very easy, although the game is also very simple and could do with some improvements.