On fdroid the best I could find was Blockinger which was last updated 9 years ago. It seems to work fine on my phone, but I do wonder if there are any newer projects or improved forks that I can use. Thanks!
The UI of Blockinger leaves a lot to be desired. The ability to swipe to interact would be a huge improvement over the buttons taking up half the screen.
Virtual buttons on a touch screen just feels like an artifact of an earlier generation of phone games. I have friends that play a lot of Tetris on mobile and all of their modern non-foss tetris games use swipe controls.