Very enjoyable game and very lovely presentation of it! I enjoyed the puzzles and wnated to congratulate you on combining the theme and subtheme marvelously! Very, very creative!
Think that the stars should change the color or glow when they are snapped. In two levels the ones that snapped were right next to the ones that didn't and it was a bit hard to see which one wasn't dancing. Also some of the stars in the reflection went in to the snow and weren't visible. Maybe those could also alternate slightly in color or the reflection pond needs to be larger to accomodate all of the constelations.
The overall puzzle is very easy which goes with the cozy vibes, but I think that it could be improved if every star had a different aspect to it so that it needs to go exactly where it is supposed to based on the reflection. I realise this was not feasible for the provided timeframe, but it maybe could be something if you decide to build on this further. Maybe it would be interesting if the constelation once it is built creates a background image of the sign that it created? Some fancy fade effect or something to reward the player for constructing it along with the line effect you created. Once again, very well done!