Hey, thanks for trying it out.
Crashed as in, it generated an error or froze? Since both ways of closing the game use the same OS command to close the game I'll have to check if there's a more linux-friendly method.
I get a lot of people saying that you get used to the controls over time but I'm still doing my best to improve them when I can think of something. I tried having it where you didn't drag and drop abilities but clicked them then clicked elsewhere and it didn't feel very good. It's not well explained either but there's a few different ways to drag abilities (pitons/sweep have variable ranges depending on how far you drag, dagger hits in 8 directions, scimitar hits in 4 directions, axe in 2, buckler in 1, I wonder if people are fine with sussing that out themselves or if I should work on the UI for that. UI design remains my archnemesis.