This walkthrough was done by Kongregate user Half, not by me. This video was done with his permission (obviously, as he sent it to me to upload!)
The level order in this video:
Secret 1, 7, 8
Secret 3
Secret 2
Secret 4, 9
Secret 5
Secret 6
Secret X (10) + 1010 Coins Get + Ending "Screen"
Game: http://www.kongregate.com/games/YMM315/moneyseize/?referrer=Tasselfoot