Man this game is amazing! The art style is top notch! And the game hook is phenomenal, it really blends well with the genre. Seriously great job!
I had some technical issues in the web build, I don't know if it's related to running the game on Linux using Firefox, but there are portions of grass which are totally black (I only knew it was supposed to be grass from the screenshots) and the music stopped looping at some point. These are minor things, and probably related to running the game on the web with Linux (it's finicky sometimes).
Other than that, the experience was smooth. The intro cards made the core loop of the game clear, and the enemy AI was really good. I really enjoyed how they don't notice you until you attack one of them. You have some really strong foundation here.
Moving forward are you planning on making it level based or you build your own garden and then have to protect it?
Can't wait to see more!