The following updates have been implemented:

Added: Selectable stage theme (Grassy, Muddy, Snowy or Random) You can find it at the bottom of the screen on the MODE SELECT screen.

Fixed: Murky Achievement  (Steam version)

Fixed: Steam Overlay + F12 Screenshot problem  (Steam version)

Big Thanks to Antoine G. @__sleepingpanda for help with Steam Overlay problem and Baltus for bugs report.

Happy gaming! :)

@FobTi