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I'm trying to make some animated sprites but when I add them to GE they are all jumpy, bounce back and fourth quickly. Can anyone tell me what's wrong with my animation?

Animation Right

I'm studying your RUN sprites, but cannot see what's wrong with them. In fact, they seem to be right for a run action.

However, there are two important things that I use when making sprites :
(1) Each sprite's center point should be equal, as well as their width and height.
(2) The bottom side of each sprite should be cut à raz like the example below so that to avoid unwanted, invisible-to-the-eye pixels :