Finally completed the game, nice one. I was originally not liking the game much, but somehow the grindiness caught on me and I am enjoying it till the end. The game design and graphic are nice, and the progression system is great too!
I just wanted more direction on what to do next, may be more dialogue or signs explaining the game a bit more? Especially during the late game where you fixed everything, I eventually did stumble across the light area and got some sunflowers, but it was more an accident rather than an ah-ha moment, which take away a bit of the excitement. I also miss clicked numerous time, trying to harvest but shoot instead, wasting precious energy. Probably changing key will do.
Anyway, I think you did a very good job on the game! Well done!