I'm happy to announce that the game is now officially playable on Steam Deck!
The latest update made small changes to UI and reconfigured cloud saves to ensure a smooth transition between devices/systems. Trying it out on Steam Deck made me realize that white on grey might have been not the best choice so I added a small outline to certain UI texts for better readability (most noticeable in the menu).
In theory, this update also improves the experience on smaller monitors and makes it compatible with other handheld PC devices.
Steam Deck provided courtesy of Valve for testing and development.