Really fun!
Felt really easy, not because of gameplay (that was in a decent spot), but because I kept getting shields and 1-ups like crazy. Random enemies probably shouldn't drop those.
I didn't think to use the special weapons until I was like "wtf do these books do? Is there a button for them?" so maybe a quick control overlay
The tiny hitbox for enemies was good, but still had issues squeezing through gaps.
At one point, I was instantly teleported to the next level because I happened to be at the exact space for a door as soon as those would have appeared.
And I still can't tell if the shot actually has an explosion range or not?