This is a cool idea! I don't know if I fully understand what's going on- I made some hybrid plants but I don't know exactly how to feed the pumpkin on the right lol. I think there are little things you can do to help convey things a little more clearly (Like having the icon in the shop for buying blood be more clearly tied to the watering can. Either have the same icon on the watering can or make the shop icon be a watering can with the blood symbol next to it or something. Little things like that can help a lot).