Race the Sun is fun. I played on Vita so far. I think the game has a bug that lets you advance levels faster than it should, though. It seems like if you complete a 1 star goal and complete a level as a result, on your next run you still have only one star left to advance to the next level. I.e. it doesn't wrap back to 0. So get the next 1 star goal and you go up another level. Etc. Getting a larger number of stars goal is actually a detriment as it wraps around and then you might have 2 or 3 left instead of just 1. I'd prefer that it worked right, though.
I'm not sure it's worth $10, but $5 would be a good price. It is rather addicting, though and I don't regret the purchase. I played quite a lot.
I'm not sure I'd ever 100% it. Some of the trophies sound impossible, at least for me.