One of the biggest tips I can suggest is buying straight-away the coin duplicator. It makes the game incredibly faster to complete, and it allows for more personal customization with you character and his gadgets. Without it, some of the later coin grinds for leveling up can get tedious.
Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete.
Otherwise, please post a new thread in this forum instead.