well, ninja gaiden is very different from the other 2, but if you want to know something very exact we can help with that.
However your question is a bit vague and needs more definition.
have you tried to read the tutorials there are quite a few platforming tutorials around that can help you. if you get stuck on a point later in your games creation feel free to ask a more specific question and describe the problem.
here is a good tutorial on how to make a platform game
there is also many tutorials you can view on the scirra website try searching the tutorials to find what you are looking for.
tutorial section of scirra