So I revisited and tried on PC. I kept running into the same crash on HTML, but the download ran smoothly.
I like a lot of what you have here and commend you for tackling this type of game. It must be a beast to code. I think you can add a lot of polish by focusing on UI. I wish I knew more clearly which of my player characters still needed to complete a turn, or I wish there was the option to skip turn. Moving multiple units at once would be great too.
Overall, a really impressive entry. Love the attention and care that went into the intro. I want to know more about this world.