i farm good, very happy.
but really, it's fun! I could see the concept being expanded on in the future and making a game I could sink my teeth into for a while. As it is, you would benefit from tightening the window between invasions-- before wave 2, I had reached over 800 defense, and only needed 150. It made it feel a little like I was wasting time on the second half of the time between waves, since I was already so far over the threshold. I kept faming so that I'd get the coin payout, but then ended up at a point where I had 10 of each seed in my inventory and all my plots full.
The game worked well, though, and I didn't encounter any real noteworthy bugs. There was a small matter of the pop-up for the scythe flickering on occasion, but it wasn't consistent to reproduce, so I'd say that's super minor!