I enjoy 'genetics' breeding games, so this was a neat little idle game. There is a lack of anything to do though, while your waiting for the next tier to appear. Maybe a side game that would add science points?
It would be great if the plants worked like they do in my backyard... so you can either go buy the seeds, or keep a plot of ____. Spend time on the plot (In real life this would be you killing off the plants that don't produce as well, and saving seed from the good ones) and get better seeds that way.
I really like this game. I do think though, that a walk speed of both you and the enemy would be a vast improvement. Taking so long to walk places can get a bit tedious.