Proton experimental seems to have fixed the issue on intel. There's still some slow downs in the menus and it initially launches to a black screen, but the game is (as far as I know) at least complete-able now.
Tested it on my oled deck, can confirm I can start the snow levels now without the game crashing. Highly recommend the game be swapped over to proton Experimental for deck status.
@kisak-valve still marked as verified on deck and looking on protondb, seems like this game only ever runs without crashing on nvidia gpus, on other gpus like amd, the game crashes on various levels like ones involving s...