It's no problem. Thanks for taking the time to play the build and writing such lengthy feedback!
Currently there's no mouse control in combat, but for the next demo I'm planning to make battles playable with both/either. I'll try to make the other screens playable with both the mouse and keyboard as well. I'll try to think of a good way to remedy the portrait problem, whether it be moving the enemy UI further up or something else. I'll try to make it more challenging. There will be some enemies that can "lock" the polarity bar into certain ranges for a period of time. I'll try to think of some encounters that force you to use it as well. I'll also adjust the tooltips to be a little more descriptive/consistent in terms of damage.
Settings: Thanks for reporting those. I will check them out. I wonder if it happens on Windows but I never noticed because I hadn't wiped a certain player pref or something on my machine.
Battle: I'll check out those issues with hard mode and bar-manipulating in menus. Thanks!
Bleed: Was Bleed removed from the enemy after you attack it or after the Bleeding enemy attacks? When Bleeding enemies are attacked with a physical attack (either basic or skill), the attack does more damage and the status is consumed.
Since OT's textbox only displays the number as an int, if Jean gives each character a <1 amount of OT, it will still pass, but will not change what is displayed. I decided on that to stop too many flashing numbers from appearing.
There's no party member dialogue after defeating Mizar - maybe I should've added some to thank/congratulate the players though!
Regarding the sound effect when selecting skills... Thanks for pointing that out. It seems like each time you select a skill it plays the sound effect n+1 times... Very weird.
Thanks again for all your feedback! I'm glad the Linux build seems to work as well as the Windows one.