Late comment, but best of luck on the project! I think the idea is solid - from the video you definitely have a direction - it's just a LOT of implementation that I'm not wholly sure you have the time for, so definitely don't be afraid to cut. 

This prototype seems like it will be really fun to play! I think the idea of planting seeds outside of Earth is unique and interesting. I'm excited to see how this mechanic develops in the next sprint, especially how players will be able to plant and manage the seeds. It has a lot of potential, and I'm looking forward to seeing how the gameplay evolves.