I played until I could speak to most aliens without unknown words appearing in the conversation. Perfected my power-jump technique to cover enormous distances without dying upon landing. Also using deep water masses to do the same. I discovered all fauna in some planets. When your powertool is almost maxed and you have a nice ship, then it is really over, since there are no motivation whatsoever to do the same over and over again. I was fun at first, but they need to implement some rewarding mechanism to do things.