I just noticed that if you leave the game inactive for a while, the levels that you previously completed will be reset to being incomplete. It's a good thing I don't have to complete all of the levels in order again.
In some ways, this is more of an action platformer than a puzzle due to the timing required. I don't like games that require precise timing. Because of this, i quit half way through the levels.
Could you please post a print-screen image of this error message? Thanks!