You mean for android? If so there aren't as far as I know. If you can find something that emulates a keyboard it might work but would be clunky.
Well can't be helped. Game wasn't optimized to be played on android from the start so adding support for it at this point would mean making a whole seperate branch of the game.
Sorry, but android version probably won't be coming ever. I know it has been requested a lot but is just not possible with me being a solo developer and all.