I ahve not kept up with nonkeyboard ways of playing, but I know people play it on their phones. I also have not kept up with development lately (sadly you can look at my updates history on the wiki for the last time I really played, at that time I also got mentally overwhelmed by all the changes I wanted to make to the wiki and things I had to check and the relentless advance of development that I basically stopped working on it (I wonder if I could have started a patreon to ask people to pay me to update it but otoh I was not sure if I would get anything for that, then it would feel like work and it also seemed like a really weird thing to do, even if it would have fixed some of my financial issues (and I also didn't think people used it that much)) so that period is the last period I have solidly played, and so much has changed since then. So you could try the free version first if you can get that onto your steam deck, or ask on the subreddit/discourse/discord how well it works for a steamdeck.