

Occasional audio bugs that resolve themselves
Charming plattformer that runs perfect out of the box. I had no problems across the board. Would recommend setting deadzones so you dont climb up and down while swinging, but its not necessary at all.
Audio would sometimes stop for 1 - 2 seconds then shortly return to normal.
Works near-perfectly. Game doesn't allow full fullscreen for Steam Deck's aspect ratio, resulting in blue borders on the top and bottom.

Works great OOTB, but has some issues.
Game window captures all keyboard input, even when not in focus
Tends to crash after approximately 1 hour of game time. Luckily the levels are short enough that this isn't a huge issue.
Haven't tested on Windows, so these issues might not be Proton-based.
switching window (e.g. with multiple monitors) takes two attempts
consistently crashes after a while (at least an hour) with "eventfd: Too many open files", with ulimit -Hn
of 524288
The game ran perfectly out of the box

Very playable
escaping from fullscreen is a bit weird, you have to switch workspace twice before the game gives up focus