What pixel size should you use for tileset games on mobile landscape

I just wanted to ask a question.

I have been developing functionality on my game and i have most of the functionality complete so now im thinking of putting the design together.

I wanted to ask for a mobile game which is landscape, what pixel size should i use for the tileset design 16 by 16 or 32 by 32?

And also what pixel size should the enemy and player be?

This depends on your game and your choice of artistic style and probably also playability. So: it’s all yours to decide.