Easily the best mobile game I've ever played and I don't know what people are talking about when they say it gets stuck on a screen but that's not happening for me. I love space and its fun to do this stuff. My only complaint is that it doesn't 
let you play Jupiter or Saturn's moons. Or just anything outside of the asteroid belt. I would pay for it but it doesn't let you pay on an apk for some reason. I also can't save my progress and connect to the game. But other than not being able to pay for the other things than I highly recommend.