Hello @KPull, please grab the compatibility report template from https://github.com/ValveSoftware/Proton/issues/new?template=compatibility-report.md, copy it here, and fill out the requested details.
@kisak-valve Apologies. I have updated the initial description of the issue.
@KPull the game behaves normally on my end at fullscreen and windowed. It's possible something in your setup might be a factor here, and something that jumps at me is your kernel and mesa (gpu drivers) versions, your kernel is from 2021 and mesa from 2023, so I would recommend trying with more recent versions and see if the issue still happens on your end.
Nothing extracted yet.
Compatibility Report
System Information
I confirm:
steam-730870.log
Symptoms
I have encountered an issue with Burger Shop 2 (and seemingly the same problem also exists on Burger Shop which has ID 730840) where there is significant mouse lag while running on Proton. Moving the mouse results in the cursor either moving erratically or with a significant delay.
Reproduction
The problem is apparent when you launch the game and play any level.