last shard in Zone 3 - Deconstruction? Hi, it should be do-able. But some of the harder sections require a well timed double jump. However, achieving 100% in the later stages of zone 5 can get a little tricky. What device are you playing on? I personally think its a little easier on iPad.
Typically, I'm not a big fan of auto-runners, but I thoroughly enjoyed playing this game from start to finish.