We have 3 cheats and tips on iPhone. If you have any cheats or tips for Lub vs Dub please send them in here. You can also ask your question on our Lub vs Dub Questions & Answers page.
Don't take unnecessary chances trying to get ALL the hearts as it is not worth losing a life trying to get those that are in tricky places.
Remember that when you are underwater you have the ability to jump a lot higher.
Make a point of learning what the power-ups in Multiplayer mode do so you can use them to your advantage.