This piece of code just looks if the jet pack man is colliding with the spikes, and if it is, it takes away a bit of the health, and calls updateHealth();. We could add a game over-screen to it too. While you are at the main stage, press F7, or click insert>Timeline>blank keyframe. Then the stage should be… blank. Whilst having the frame selected, open the properties window, and type in gameover into the frame name window: After that, open the actions window there, and type in