Done testing and found some errors and some nitpicks of mine.
3 things for the price of 1: The Mushroom and Fairy Palettes are terrible (As you didn't add any coins or ? blocks or anything else), The messages are iffy, and the palette of the foreground is bad.
Here's a couple palettes for the FG I whipped up:
It's hard to pull off, but you can go through the wall here. Also, why do the fairies hurt you when you don't spin jump on them or stomp them?
This part is almost impossible to do without hitting a fairy.
...And how am I supposed to get through here without hitting a fairy?
Other than that, it's quite good. However, there's a lack of coins, ? blocks, and the main thing: Enemies
. Anyways, keep up the good work.
I have nothing else to say now. Huh...