This game was really something else. +1 for being original, I’d never think of something like this.
To turn this prototype into a game seems difficult, but I see potential. You could limit the amount of blocks you are able to place to add some constaints, maybe add a pause function to be able to plan out the effects without getting wiped out by corruption. Maybe a fire that is blocked by living cell generators and wipe out vines would be interesting, to force you to use both components.
An area where you can’t plant anything combined with a goal you want your spires to reach could be interesting. It allows for puzzlegames where you have to reach a point without getting destroyed by corruption or fire.
I hope you continue on the game. The games that’s fun to play without goals always glow potential.