So I just tried loading the game on my phone and have the same issue. Honestly I didn't think browser games on this site would even be playable on phones, so I guess that's a newbie mistake on my part. Even without the graphical error, there's no way to use most of the controls without a keyboard, so phones are not supported for this game right now. I'll try to get it fixed and working in the next update.
Of course, I'm only guessing you're also on a phone. If you're not, it might be cause you're on an older device, I'm not sure. But I think fixing it for phones ought to fix it for that as well.
Thanks for leaving a comment, it was majorly helpful!