This game is fantastic for such a short game jam. I pretty much liked everything and enjoyed my time with it.
I will instead focus this review on the few things that could be better:
-Audio starting at 100 is not a good idea for web games.
-As pointed out in other comments, enemies can still act and attack you while you read the tutorial popups.
-The music is great, however the tune felt a bit too repetitive.
Other than that, lovely idea and execution. I can see this one potentially winning. Great job!