Algodoo

http://www.algodoo.com/algobox/details.php?id=11649

Heres a jumping frog I made in v 4.22. It works good in 5.28 but not as well in Algodoo. It still works in Algodoo but needs work.
The frog jumps pretty well and its a pretty fun game and doesnt use a stabilizer. You can make his tongue shoot out to catch and eat bugs. The frog turns into a prince when you get to the castle and kiss the princess at the end of the game.

Any suggestion on the landing improvement? as there is no stabilizer I will need something else.. and Ill try that with the transform into prince xD

If you look at mine I used the front legs to help control the landings and to help keep the frog level in the air. I kept adjusting the weight of the front legs and the spring strength and damping. I also kept adjusting the springs and hinges on the rear legs until I got good stability. (Remeber mine works best in 5.28)
It just takes time to get it right, yours already is pretty good. Yours also doesnt seem to have control for how big of a jump you can make, it seems like it only has a big jump capabilty. If you test mine you can see the user can make short hops or larger jumps, you can even just scoot across the ground instead of jumping(controlled by how long you hold down the key). That gives more control thru an obstacle course.

Also if you keep the body weight down and the weight of the feet a little higher to make the center of gravity lower it will help, you shouldnt need a stabilizer but it will just take longer to make it reasonably stable.

So you don't want to use a stabilizer am I right?

You are right karate I'll try adding some front legs etc later.. when I figure out how to