Almost great
Simple yet addicting gameplay. Creative storyline. Really nice achievement system and unlockable storyline. I liked it, and would like to call it one of my all time favorites.
However, there were some flaws that just ruined it for me. The main one was the difficulty ramp. It's fairly easy for most of the game, but then the one last "Platinum Chain" achievement is virtually impossible. I don't mind difficult games, but I don't like the way this one sneaks up on me. When I spend a few hours on a game I like to be able to finish it.
One way to fix this would be to increase the bonuses. It would also be nice if they were something other than just extra skill points. Skill points are nice, but get kind of boring.
That's about all the flaws though. Overall good game. Good luck in future submissions.