I can't really criticise the tree for it's leaves, since that really has become it's style, which works.
I could only really criticise it if it clashed with another build you put it in.
The only thing I'm not kind of keen on is that floating 1x2 branch on it. If that's what it is supposed to be.
I can understand that it should be a branch, but it just doesn't quite look like it is (which is a common problem in Blockland, where it's difficult to get detail in small scale).
The fountain is nice and sweet.
Which is good, because it's very easy to go overboard with fountains, and try and make them too fancy.
And of course again, it's difficult to get fancy details in when it's small. Before you know it you've made a 32x32 fountain, and it still doesn't look as detailed as a real life one.