I agree with 'SturmgewehrKreuz'. You should add cloud's reflections to the water.

This is awesome by the way.

Nice! It could be great if clouds could have a reflection on  the water...

For being new to pixel art and doing this one in a hurry, it's amazing! I even like that down there is not going on much, makes the tree seem even bigger!

For sure. I'm pretty new to pixel art and I made this one in a hurry so I'm sure there are a lot of areas that could be improved.

loving the colours and shapes, although it feels like there could be a tiny bit more refinement towards the bottom/ground area.