Very addicting
How many planets are there in the solar system anyway?
The award that says you need to land on a certain number of moons actually means you need to get that many distant moon bonuses, right? Meaning you can't just land on them, you need to land on them from a long distance away. And you should probably explain that moons are just the smallest kind of planet. The Earth's moon therefore is not an example of a moon in the game.
And how do you get the wrong way medal? You can't launch the wrong way, so I guessed you had to slingshot yourself to fly the wrong way. I tried that and it didn't work. So then I thought maybe you had to fly the wrong way and land. I tried that and it still didn't work. So how do you get it?
The bullet ship is useless because its increased gravity still maintains the same range as the gravity for the other ships.