Man! You got real specific there, didn't you?
That's why there's no tutorials, because you're being too specific!
Instead of looking for how to make a UFO looking ship to fly around, look for object loading and movement. As for the levels, there's a few ways to do it. Actually, there's a LOT of ways to do it. If you need help making the actual levels, a nice and easy point and click application called Magic World is available in the 'downloads' section, I think. That should definitely help alot.
Destroy you with my mind, I could!