The game has a tendency not to open in the correct resolution. Before entering the game it's recommended to change the resolution to the Steam Decks resolution of 1280x800. But even after adjusting the resolution the game may still load with the incorrect resolution.

This is a great way to play this game and there really aren't any annoying issues other than having to manage the screen resolution. With the low latency of having a controller physically on the Steam Deck, this is a great way to play this ryhthm game.