This sprite addition is nice and adds a challenge - however, now I'm thinking you might want to raise the cloud ledge by a couple of tiles so the player has to take the full route up.
This particular tree chunk just looks odd.
Minor graphical bug: I'd just drag the stones all the way down to the bottom of the screen rather than connecting them to the ground like that. It looks quite weird in this case.
Was there supposed to be something here? I came onto the screen and nothing spawned.
This key seems quite easy to get. At the very
least, I would have totally obscured it behind one of the tree coverings .. but in reality, I'd just hide it more and/or make it harder to find.
Strangely enough, these two Gusties only spawned when I came back from the right, but not while I was going to the left. They seem a bit out of place anyway - perhaps you could replace them with another set of swinging monkeys somewhere around here?
Graphically, this looks a bit odd. I'd connect the ledges so there is no crack in between them.
You can hover to the left of the Chomp Rock and reach the top of the very first area. I suppose this could be taken as either a bug or a potential hidden area where you could hide a flower or a couple 1-UPs or something. Definitely might be worth taking advantage of.
If you re-enter the other side of the locked door, you end up here (one tile to the right of the closed door). Was it even supposed to be closed in the first place?
It's actually very easy to get this flower without using the Chomp Rock or the rolling Goonie. In fact, you might need to rework this room a bit in general because it's pretty easy to break.
Aside from these, the new additions are nice. I missed 4 red coins and a flower .. not sure where they could have been.
I'm looking forward to playing a finished version!