Same issue for me on Omarchy (Arch + Hyprland). Tested on v0.8.6a of the game. Unlike others, no combination of window mode, "confine mouse cursor", or Alt+Tab tricks work.
Some observations in case it helps:
- Panning via holding RMB works just fine
- If I move the mouse veeeeery slowly, taking care to only move it in tiny increments at a time, then I can get tilt/rotate to work, but as soon as I speed up just a little bit it freezes.
- Moving the mouse to the edges of the screen with MMB/Alt + LMB down does cause it to work a bit better. With edge scrolling enabled, it also pans the camera, which is frustrating. Turning that off makes it somewhat more reliable and usable, but still not ideal.
For those stuck with this issue, consider upvoting this suggestion to allow tilting the camera via keyboard controls (right now you can only rotate). I would like to see this issue fixed properly, but having a keyboard alternative would at least make the game more playable in the meantime.