Yes

when the flare is frost

Flare goes brrrr

Other Sonic games like Adventure are marked as Unsupported but run perfectly fine, and other games run under Proton beautifully.

The fact remains that the game runs worse than on Windows and those looking to run the game on Deck will be disappointed.

That said I have played to the third island on Windows and have had a great time, I will update my review at some point

There's no Linux tab on the specs and it does say Unsupported on the Steam Deck compatibility tab.
If you can throw 60$ at a game but can't spend 5 minutes reading the store page to know what you're purchasing exactly, you deserve to get scammed.

it's true that linux users is the most stubbornest next to Apple users lol They just dont want to adapt rather than complaining about devs for not adding linux that probably only have few thousand users compare to Window users in over millions