Hey. I am a Russian-speaking, and writing through a translator - may contain errors.
In general the game is great and unique. What I would like to see in part 2?
Well the game does not slow down and I would like more details of the objects(as you have said yourself), but also the opportunity to reduce the detail of this (just in case

Can increase the limit to 40 automatic production of seeds as an upgrade of an asteroid?
More powerful, cunning and intelligent AI. To collect more seeds to attack etc.
And most importantly - make it possible to point (asteroid) collection of seeds. In order to achieve the limit for asteroids (or as soon as they come off the tree) seeds were flying to the specified collection asteroid automatically.
Well, something like that