Ragdoll Cannon 3 is the third official game from its series which brings you 50 brand new and smoking levels with improved physics. It also gives you the pleasure of creating, editing and sharing of your own level with its level editor. By the way, there are unusually placed bomb everywhere in some levels that may or may not work to your advantage in beating certain levels. Anyways, here's a complete Ragdoll Cannon 3 walkthrough that might help you with strategies.
Here's the Ragdoll Cannon 3 level editor tutorial video.
No cheats I can find on the net so far but I am still looking around. Meanwhile, just enjoy the Ragdoll Cannon 3 Walkthrough for all levels.