It's constructive, not negative! Don't worry about that.
I did notice the battle button was off the screen for me, too, but only on itch. We figured there'd be problems uploading it over here, but that wasn't one that I was expecting. As for the rules/instructions, I'll look into making them easier to understand. If there's anything particular about them that stood out to you as difficult, let me know. Thanks for the feedback!