The artstyle is very nice, I especially love the depth of field that you used!
Apart from this the gameplay is a little bit dull? Hitting a key near every tree gets kinda tideous very quickly, maybe you could make it more interesting by somehow automating this step, so the gameplay is more about exploring the city and finding every tree rather than slowly working your way through tapping every piece of greenery individually (or maybe combine them into groups).
Dashing etc. would also make much more sense if the humans would just always get scared by the goat, since converting a tree without being seen is not too difficult.
Nonetheless you did a great job!