Hi,
I went in blind and tried your game . At first I had no idea what I was supposed to do, I just clicked anywhere to spend resources. Later I realised that I need leafs to generate sun resource. Absolutely remove zoom in/out. I would suggest that branches should not be generated randomly. Just make it properly branch out. Currently it looks jarring if you spam it and you get 10 branches in one spot with 50 leafs.
UI. I would remove the slider for resources, I think it would look better with just numbers and icon.
I tried 3 playthroughs. Died in all of them rather quickly. I didn't know that upgrades were persistent. If they are, they should not be inside the game, but rather outside, in the main menu before starting a game.
Same as the other person, I did not understand how to tap for sugar, I think it just automatically does it for you?
I can't say I enjoyed it. But I believe this game could become a single tower defence game. Grow your tree, fend off pests etc. vibe.
Hopefully this information helps you.
Good luck,
Remi