Can you play it without a controller and does it have Linux support? (Proton)

[ReadOne]

I don't own a controller, but according to the Steam page the developers recommend one, so my question is: Is a controller mandatory? (I'm not a fan of controllers at all)

My second question:
I only use Linux to play, so my question is does anyone know if you can play the game on Linux (Lutris, or Wine, or Proton)?

Thank you very much for your answer.

Translated with DeepL.com (free version)

[Ratsplat]

Yes, and yes. Proton, Linux Mint, latest updates.

[Mario Mom]

I don't play with keyboard, but I know there are keyboard + mouse bindings for all of the actions.

The game works well under proton 9+ without needing to mess with settings. I haven't encountered any issues myself (including during an 8 hour play session) but some people have reported occasional crashing.

[Ratsplat]

The crashing seems to be equal all over the place. Like for me, my AMDGPU might act dumb every other day.