To get plays (minus promoting it everywhere), i think it is important to have an eyecatching thumbnail, an interesting tagline, and if you want to go above and beyond, a gif of the game in the screenshots (which I dont always do because I get lazy)
Looking at your game, the thumbnail is clean and well made but idk I don't feel like it would catch my eye when scrolling through jam entries. I'm no expert at what makes a thumbnail good, but generally I think it's good to have more than just text. Include a hook or something, get the players curious and intrigued about your game.
And the description, intergalactic chess, doesn't really hook me, like all it tells me is that it is chess and space themed. If your game has a cool gameplay twist I suggest showing it in the description and possibly in a gif in the screenshot section.
But then again I feel like getting your game played is mostly just marketing or dumb luck anyways, so I wouldn't worry too much about it
Hope this helped a little