Nicely done!! Love the art and the game design. Good little gameplay loop, can see how it could expand with more weapon types and attacks. I wanted to protect my tree with every fibre of my being! haha. The rain effects were really nice too, especially when the storm hit and it started to really come down. I noticed a small bug with that where, at least on my screen, the rain came down from the middle of the screen, rather than the very top.
Great work! :D