Varell: To be fair I'd get it for $10 more than $5. Keep in mind all the effort involved and the time you get replaying to encounter differing factors each playthrough if you like repeated challenge. I just finished the normal difficulty in around 2 hours after high-tailing it back on course to Terra Nova... but it crashed.
Even so, when it gets the crashes fixed, I think $10 is a fair price. People rent movies for similar dollar value and length of enjoyment.
Gameplay is predominantly as others have said, a mix of FTL and WASD ship flight with permanently bound controls. It is enjoyable overall, but the crashing and lack of difficulty make it akin to playing chess with your dog. In space.
Yeay, second thought $10 is about right.