[CC] [WIP] [Newbie] Floating island

[Passthejam]

So I started pixel art a while ago, and recently I came up with this:

I intend to add some details (player, text) but I want to perfect this part first. I would appreciate some criticism mostly on the colours and shape, I used this as a reference:
I should mention that I intended for it be viewed at something around %400. Thanks in advance! 

[Pusty]

I love those colors! The tree looks amazing! Not too sure about the flying dirt thingys. Also adding a color to shade the dirt may make it better.