This was a nice take on the theme! I like the idea of linking stars! I also like that you gave the stars a different shine when we are allowed to link them!
As feedback, I would say that it would be nice if the rocket sprite was placed above everything else (when the star glow happens, I can't see the rocket direction well).
I also wish that there was somewhat a map or a goal that would help me plan the links, instead of trial and error (maybe like 'you can link clusters' or 'stars of the same type' sort of ideas).
Other than that, it's a solid prototype for something bigger!
Keep it up! 💪😊