This is a game that should be shown when explaining the concept of "game juice"!
Gameplay: Pretty cool! I didn't think there would be a tower defense game here, especially not one, where you draw constellations instead of towers! I'm not sure if I was supposed to end the game after the 8th wave. I kept playing, but stopped after over 40k points. At this point I felt like I was invincible :)
Graphics + audio: JUICY! The camera effects (shake + freeze frames) really do the work here! I also liked the vibrant colors. Sfx and music worked with the graphics.
Theme: I really like your interpretation! It uses "stargazing" in a fresh way. Really cool.
Over all- I spent more time playing your game than I thought I would! Really cool submission!