Fun, and an incredible showing for a first game!
A few issues I've found so far:
1) I got the Air Hop Scroll from the Mothman boss, but it doesn't seem to work? I just have my usual jump. No double jump, no extra height.
EDIT: Ok, I found you can equip a different scroll in the pause menu. But...why? It's a double jump. Just let it work when I press jump again.
2) Sometimes damage overlaps instantly kill you. Like, if you just hit spikes and are quickly hit with an arrow, or arrow + enemy, sometimes health instantly dropped my 3 extra remaining hearts to zero instantly.
Also, projectile hitboxes should be one tile in height. Unless you're very fast and get past a cannon or enemy before it fires, taking damage is all but guaranteed: jumping over is very tight given movement speed, and standing one tile down is not enough to avoid damage (maybe there's a Scroll of Ducking I don't have yet?).
3) Considering this, the game needs way more save points, or do away with them and make it so you auto-save when you enter a new area. The amount of time spent in the overworld walking back to where I just died is a bit obnoxious.
At least increase overworld speed significantly, or let us keep collectibles after death.