

Whenever "Venture Wing" item is used, the game uses a spinning transition that crashes every time.
The game itself played fine, outside of the crashing. I've heard reports that video cutscenes don't play properly, but I can't verify that at the moment. If this crash bug were solved, this would be an enjoyable experience on Steam Deck.
indeocodecs install now works with the flatpak version of protontricks so movies are now playable
Installed indeo codecs using protontricks. The sandbox used by the flatpak version of protonticks causes the indeo codec setup to crash, so I installed protontricks via pip instead.
Game prompts about missing indeo codecs when launching the game, which prevents cutscenes from playing. Installing the codecs via protontricks resolves the error and allows cutscenes to play.
Cutscenes require indeo codecs, steamdeck won't install via gui or console with protontricks
Crash when using Venture Wing item
Missing Videos (indeo codec); attempting to install indeo codecs via protontricks crashes
Title screen music doesn't play on initial start
Movies require indeo codecs. Trying to install with protontricks just returns errors.
Game itself works great on latest proton. Can't find any way to get movies and some audio problems working.
It''s playable without the videos.
I had to switch to full screen otherwise mouse hangs.
Requires indeo vieo codecs to play in gme videos.

The few minutes of the game intro I played, up to where I could move freely, worked fine after the protontricks item was completed
Used:
> protontricks 427680 icodecs
and installed only the Indeo 3.2 codec per https://www.protondb.com/app/61500#lDZL6DkbSC
Alt-Enter successfully switches between Fullscreen and window, but after fullscreen the first time, returning to a window had lost the window manager's title bar, etc until game restart
installed icodecs for videos.
music only seemed to play every other area or after switching between soundtracks, fixed by installing dsound

Install winetricks/protontricks icodecs to Proton prefix (427680) to play video cut scenes properly.