If you want a quick 10 gamer points and a new game mode then all you need to do is complete puzzle mode. Puzzle mode looks much harder than it is as you can use hints to show you exactly how to complete 79 of the the 80 puzzles so you only have to complete one of them on your own and it is not a very hard one either, So simple use hints to complete each puzzle and you will have it done in no time. Once puzzle mode is completed you will unlock Cognito mode which is a much more fun version of puzzle mode and you also get 10 gamer points boot.

Hope this helps