The best pinball game around.
You play as Samus while she is in her ball form. While on the pinball map, you can do certain missions and beat matroids and space pirates that are on the map. In multi-mission mode you can change maps once you have got passed a certain score on the map.
Some missions require you just to rack up as many points as you can, while some are boss stages. At some point during a mission Samus can even stand up and turn into her normal form. This requires you to point her gun and shoot at enemies for a mission.
Upgrades are available in this game. You can get bombs to lay around the field and missiles to use when Samus is shooting.
However, there are only 6 maps in this game and its playability is extremely short.
Overall, it is a good game while it lasts.