At its core, Line Rider 2: Unbound has many of the same addictive qualities as the freeware game that inspired it. It's too bad you have to suffer digging through several layers of garbage to get to the good stuff. The powerful draw of the original Line Rider speaks for itself. By dropping the unnecessarily garish frills of the first retail release and going with a more streamlined presentation with extra room for creating bigger tracks, inXile entertainment could have had a real sleeper hit on its hands. It may not have been as commercially viable, but it would still have soul - and that's what players want.
Bottom line: Sometimes indie games are best left independent.
Recommendation: Skip it. There is some worthy gameplay buried in Line Rider 2: Unbound, if puzzles are your thing. However, the original freeware version is still the place to go to let your creativity flow.