My feedback for Out of the Pot:
What your game does well:
The mechanic is unique and interesting. It took me a moment to understand, but the rules are made clear thanks to the helper tab.
There's a bit of a buffer that allows new players to get acclimated to the controls.
Executes the theme 'inside out' well. It does really good with expressing the outside coming from within.
What your game doesn't do well:
The cursor doesn't change when it's over a clickable GameObject. This confused me because I didn't know what to click on, thus unsure of how to initiate attaching a leaf/stem/turret.
There was only one kind of enemy. Once the player figures out how to keep them at bay, or grows their flower to an unstoppable force the gameplay becomes stale.
No audio.
Areas of Opportunity:
In your code, adding an interface that responds to cursor hovering can clear up a lot of confusion for new players and make the game more interactable.
The mechanic has a lot of potential, and you have the foundation of a good tower defense. I think it does separate itself from Plants vs Zombies in its own way. More variety to the enemies and resources and further widen the gap.
Add Audio.
I hope this feedback helps!