How to hack Cavegame.io? I need help.

Hello! I cam here looking for answers. I was wondering, how do you hack HTML5 games, and more specifically, .io games. There is this one I really like called Cavegame.io, and I was wondering, how could I give myself infinite health, reach and gold? I know it's possible, because there has to be a cap of some kind, and all you have to do is bypass it. I just don't know how to do it. Anyone have any ideas?

its not possible..