Game has so beautiful visuals! Sounds are also strong. I liked how you indicated poison value on the tree.
Controls are good, my mouse is little tired after playing though. :-D
What I missed in the game is some ending (or maybe I was just bad at the game and didn't get there). It was endless swarm of enemies and it kind of felt "hopeless". Having some time indicating how long I need to survive to success or some score based on how long I was able to deffend would add the motivation to play again.