I watched your youtube video and had some feedback. I'll just post my 4 notes that I jotted down during the first 5 minutes...
1.
I'm not sure why you need a long time period for the offspring to grow? Could the growth happen faster or instantly if the parent is going to die anyways.
2.
When a green cell mates with a yellow one, I'd like to see some visual change. Blue would be an obvious colour choice if you're into color theory. Instead being identical to its parent, it could also pick up a couple of the yellow tentacles.
3.
You mentioned that the world is a volcano sea. I'd like to read about more about this world, and does the terrain make a difference. For instance, when the cell moved over the brown or purple areas, perhaps it could affect its speed or health.
4.
This genetic inheritance seems like a skill or tech tree common to many games. Do you plan to show this genetic tree in a separate window?
I think your game has promise - would be great for the classroom - reminds me of Spore or
Osmos