Prrrrkl!
It's Mayday, so Open Sewer and it's parent game, INFRA are now both on sale with record high discount percentage!
https://store.steampowered.com/app/951240/Open_Sewer/
https://store.steampowered.com/app/251110/INFRA/
Also we did push 0.1.6 update out few days ago, which improves FPS and fixes some major game breaking bugs.
Full changelist can be seen here:
https://github.com/loiste-interactive/Open-Sewer-Issues/blob/master/CHANGES.md