Lets Remember...Solar Jetman!
http://www.vgmuseum.com/images/nes/01/solarjetman.html
One of Rare's best games.
Essentially an update of the classic Gravitar, Solar Jetman combines exploration, shooting, and gravity in one well-designed little NES game.
Each stage offers a different level of gravity, and the player maneuvers their space pod by means of a single thruster. The pod can be rotated 360 degrees. You must be careful not to over or underthrust, avoid colliding with walls, manage your very limited fuel level.
You also have to do some shooting. Maneuvering in the caverns and getting off shots can be quite the challenge. Luckily, shooting is kept to a minimum, as the real emphasis of the game is exploration.
In each stage, you need to find and collect fuel for your mothership, treasure, ship upgrades, and pieces of the "Golden Warpship". Just like in Gravitar, you must use a tractor beam to tow your finds back to the mothership.
Money you find throughout your quest can be used inbetween stages to purchase upgrades to your pod- such as efficient engines, better weapons, etc.
A great game, and superior to Gravitar in every way.
Who remembers this NES gem?