I really like the concept, and I played up to level 4. Unfortunately, I got stuck there because I couldn't figure out how to avoid the trees. No matter what I do, I always get attacked. But up until that point, I had a lot of fun playing!
Theres an intel in day 3 telling you how to beat the Watcher (the tree), you should always keep your eyes on it, you can ignore it but dont do that for too long. Also thanks for playing! I will check yours later