I'm a bit lost on how the resolution for this should work. Is it 64x64 grids of a specific size?
Also - the movement must allow reflect the 64 x 64 so that no one can use higher resolution for smooth movement of those pixels.
If I remember correctly, Itch.io allows this by default. I do not know if it can be turned off, and the rules don't explicitly deny it (at least, I don't think they do, I'd have to double check to be sure), so I think yes.