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After beating level 15, the ending of Space Hopper will appear. It shows a black hole behind the astronaut with him standing on a planet with a pink astronaut (who could be his girlfriend) in front of him. Some dome-shaped houses with blue circular windows are seen to the right of the pink astronaut. On the top of the screen are the words "Congratulations! You made it home!"
Brain aliens - It walks slowly around and causes one heart to be lost if touched.
Blue masked robot - It will move when the Astronaut moves and stop when he does. When touched one heart is lost.
Green masked robots - A faster version of the blue masked robot, it too will also follow the astronaut. If touched one heart will be lost.
Worms - It moves slower than the blue masked robot and will follow the player. It will always take the faster route to the astronaut.
Electric planets are big and covered with metal. After a few second they will make their surface of them covered with blue electricity. A well timed jump will allow the Astronaut to not take damage from the electricity.
Hot planets are the most dangerous planet encountered. They have a black crust on them that allows safe travel around them. But in between the black crust is harmful red liquid. Sometimes there is small parts of the black crust that is between large parts of liquid.
Ice planets have a slippery surface that causes the Astronaut to move slowly in one direction but will soon speed up over time.
Present in the images of Space Hopper is an unused image of text titled "Frosty". It is not known what this would have corresponded to, it is possible it is a remnant from Frost Bite's development, or had something to do with ice planets.