I don't have any way of contacting you directly so if you'd like to do testing for Linux, I created a build and uploaded it but I have no idea if it's playable.
If you have Twitter, mine is linked to my profile.
Viewing post in How to grow your game on Itch.io comments
Well, it gets stuck in the dialogue if I talk to the anime girl on the dock, being effectively locked up at that point. It also locks up on the start screen after dying, so I can't try more than once without killing the game on the command line and re-starting.
Also, probably not linux specific, but what seems to be the strong attack (block then attack giving the thrust forward) allows the play character to move over obstacle that normally are barriar to get stuck (on the dock).