Various Gameplay Tips
Hint 1: Having a hard time beating the boss?, use one of the special attacks you assign at the start of each and every level, such as Scrooge McDuck. That should put a dent in their life bar.
Hint 2: If you time your butt stomp correctly, you're rewarded with a huge bounce. Use this to reach previously inaccessible areas.
Hint 3: By using Paint to neutralize enemies rewards you with Hearts to top up your life, while using Thinner gives you money, keep this in mind if you're running low on health.