Galaxy Man is the ideal place to start your quest through the world of Mega Man 9. The level isn't too challenging, and it makes for a good introduction to the game play.
Galaxy Man's stage is pretty straightforward, and there are only a few warnings the player needs to be aware of during the experience.
The biggest threat first-time players will face are robots similar to Bladers from the original Mega Man.... but far more dangerous. They fall from the ceiling, latch onto our hero, and drag him indefinitely, all too often to a spiky death. To avoid ending up in their clutches, use caution as you walk through the stage. If you just run freely through, at full speed, you WILL get caught. So don't always run. Take your time when moving through an unfamiliar area. By learning where they fall from, you can easily exploit them into falling without posing a threat to you.
Teleporters are another unique little addition to the series that you'll first encounter in this level. When you jump into one, you'll be shot vertically into the air out of another one. Each teleporter is connected to exactly one other teleporter. Use trial and error to see which ones lead where, so that you can progress through the level. It's not too tough to figure these sections out.
Devil Blobs also make their first appearance here. These hovering cycloptic blobs come in orange and green, and when you hit them, they split into multiple smaller blobs. You're best off avoiding them and NOT shooting them, when you can help it. But if you must, keep your distance so they won't split right into your face and cause damage.
Galaxy Man has two attack patterns, quite easy to follow.