Hi,
I'm really sorry you stumbled a lot of annoying issues but thanks for playing it on through even with those at hand.
I did put a small introduction but it's inside the farthest room that belongs to Mundo's teacher in the tower. Other than that it's only in the itch.io page but I was guessing that it might've been a bit vague in the game so I should make it more visible.
If you ever play the game again you can use Z button for the staff after you get it, X button for spells(only star spell is free others need reagents) and C button for the item you find in the first dungeon with the tent you've been.
And you change spells with holding Tab and one of the directional buttons since there are only 4 spells in total, up is star, right is bomb, left is crystal arrow and down is moth spell, but your staff interacts with spells and you'll be able to upgrade them in the future.
Also everything's done by me except background music, that's my friend, and layouts are really similar to Zelda to make people kinda feel familiar but they're definitely not final and there's one secret where you can upgrade your staff to sword that's again similar but will be way different in the final version of the game. Also statue you find creates save point when you hit it with your staff but it works a bit wonky now so it's only for show.
But thanks for replying and telling me your thoughts, it kinda shows me that even with all the annoying time you had(with apology) you found it interesting enough to play around and tell me which makes me really happy.