Not a bad level. Nice to see a stage that uses the Muddy Buddy for once.
There are some issues that need to be looked at, however.
Oh man, those arrows totally want me to go right!
...except if I did that, I wouldn't find this flower to the left of the starting position.
Was it your intention to have this Baseball Guy hit the Winged Cloud here the moment I got to this screen?
Using that Spring Ball takes you past a ledge that prevents the player from exploring further to the right here (where there are a couple items needed for 100%).
You can get on top of the land using that same spring ball from before due to the lack of objects above the item cave. Hilarity ensued.
Exposed cutoff under the spike.
Also, I'm not sure if it's a good idea to have a Muddy Buddy start on those spikes--I actually went through him by just walking off the ledge and died.
Not pictured: I noticed you just kind of dumped the last seven Red Coins within close proximity to each other near the end compared to the rest of the coins which were spaced out better. Getting 1/3rd of the red coins near the final stretch of the level feels weird...
Other than that, it looks fine to me.
My Let's Play channel
(Current LP: Final Fantasy VI, MegaMari)