I have finished the game. It was fun.
If you want some improvements, I would suggest:
1. Reflectors says that they cost atoms, but they don't.
2. Buying bunch of atoms is painful. Maybe some modifier like "buy 10 atoms at once" will be a solution?
3. In the very-late-game my stars number increased over time, but I don't know why (I guess it is intended, but I haven't found any notice what has created that).
Anyway, I really like this game.