NickenOS
Published
prime-run %command%
Occasional crashes during alt-tabs, with roughly 5-10% chance per each alt-tab. Especially frequent when swapping (running something memory-consuming while the game is minimised), but not necessarily. Haven't tried yet, but people down in the other reports have recommended switching to Proton 7. Occurs in both fullscreen and fullscreen borderless (haven't tried windowed mode)
Crashes unfortunately ruin the experience a bit. The game doesn't support saving mid-level, so you'd have to play it again from the very beginning when occurs. Technically you can save mid-level, but only stuff like amount of gems collected, not the level progress.
Successfully finished the game. PROTON_NO_ESYNC=1 is required to get sound (it's a cracking mess otherwise). Used older Proton (5.13-6) as mentioned by other reports. Overall almost perfect performance with occasional drops under 60 FPS (up to 35-40 FPS sometimes) on all-max settings and 4K resolution. Long black screens between levels, I guess cinematics. Some Alt-Tabbing will skip them. Didn't try Proton-GE yet, maybe it will fix everything and run perfectly (will post updated version then).
PROTON_NO_ESYNC=1 is required to fix sound
FPS sometimes dropped down to ~40, but was 60+ most of the time
