In short, there’s no plans for a mobile version because it would be hard to make one (especially since no one’s making money from the game). If you don’t have a laptop/PC you can’t play, sadly.
Taken directly from the official clangen tumblr page:
“No, it’s not officially on mobile, nor are there are no plans to move it onto mobile. In order to do so, we would have to recode the entire game from python3 to python2, which uses a different coding language and doesn’t translate well. It would be too buggy and our devs have enough to focus on right now.”