Jumping is essential to platformers. Without it, they wouldn’t work. At all. How would you move betwen platforms if you couldn’t jump? So essential is jumping to platformers, that it hasn’t often been changed. Occasionally you can double jump, or jump off of walls. But that’s normally the extent of the dynamic.
JNKPlat adds a new element of control to jumping that has rarely (if ever?) been seen before. In JNKPlat, the button you press determines the direction of your jump. X to jump left, C to jump right.
This may seem simple; and it is. But it adds enough to the game to make it interesting. You can download the game here, and it’s worth a try.