Plays a little slow, but it's a nicely put together auto-clicker. The wait for rockets to return and grant any technical points makes the gameplay loop very slow - this is the kind of game I think you'd want to leave running on a spare monitor and look at every now and then while doing something else, which would be fine if the music weren't so compelling. I do like being able to tab over and see the rockets coming and going, though, and the screen with the planets is very pretty. Took me a solid minute to realise that the Earn button was the clicker button and not, say, a screen title!