Just because a game has a few misleading links doesn't mean the game is instantly bad. It's a little slow paced, but offers a bit of a challenge. I'd give it a 3/5.
Holy jebus. It's just a link to another site. The walkthrough would do that anyway. It'll only take you another 5 seconds to Youtube it. Flagging is no use, as Kongregate would have obviously looked at this game because of there are achievements, and they would have to approve it.
Just rate the game on how good it is, and not just a button that takes you to another site.