Very great aesthetic. I love the concept. I'm assuming you got the music through a royalty free website, which is fine, but I'm pretty sure I've heard it in a commercial game or video before, which kind of detracts from the unique feeling the game has for me.
I feel like the controls could be a bit more responsive, especially the camera controls. Feels like it takes ages for the camera to get where it needs to be. Also, the plant growth takes a little too long to happen. The player just sits around waiting on plants to grow most of the time. There's also probably some balancing that needs to be done around the mechanic. I was able to run across a pretty large stretch of open desert and then just plant things in the shade to eat until I had enough health to get to safety. Maybe plants shouldn't grow in the shade?
Anyway, it's a great concept and a pretty good execution of it. I'm interested to see where you go with it!