Interesting idea and combat mechanics! This is one that caught my attention early!
I do think the tool-tips could be a little more straight forward, but that could also ruin the immersion somewhat, and I'm not against obscured information. I do think it's difficult in a situation like this where players are likely picking thought many games in a short amount of time, but works better when you expect people to sit down and play for a while.
I definitely need to fiddle with it more to fully understand the combat element, but I think you have a really solid base here, and it could be interesting to see where this goes! I also enjoyed the humor, and dig the sort of Earthbound vibe that it gives off.