It finally arrived in my queue.
It's a game with a very fun and intuitive mechanic. I really liked the fact that you control the scenario, and each magic rune has a different effect, it's definitely my style of game.
You already have a base for the artistic style you want to go for, and that's great. I wouldn't use AI for the art, but I understand it was only used to represent the idea of your game.
Keep developing your game! I don't know if the intention is to learn how to create your own art or to team up with someone who does, but I would follow that line of thinking.
The game has the potential to grow on various scales and have many challenges. Again, congratulations on the game idea. I really liked it a lot.