How do I make grid-based movement for a platformer?

How do I make grid-based movement for a platformer? I want the player to move one square at a time except for when they jump.

I'm not sure what you are trying to do, but you should check out this tutorial for grid-based movement:

https://www.scirra.com/tutorials/308/cl ... man/page-2

SimoneT, I want grid based movement in a platfromer, but I don't want to use tiles

I suppose left and right will be grid movement. But.

Will the jump be a grid movement ? How do you see that ?

Will falling be a grid movement ? Explain the idea ?

If a yes to those questions, then it is just grid movement in 3 directions. The down direction just happens till the object meets an overlap with ground on an imagepoint. Collissions cant happen. Everything will be a legal move untill a overlap occurs.