The game isn't set up for Mobile, apologies. That would require more knowledge of CSS than I possess to rework the UI down to a suitable format for smaller screens like that. I've been told it works decently well on tablets.
I said it works fine on my phone. I just had to go vertical instead of horizontal. In the horizontal, the controls are out of view.
And as a sidenote, you've done well on this game. Looking forward to seeing what else you do.