I really liked the visuals, music and simplicity of the controls but found the game a bit unforgiving due to the randomness.
I would like to suggest, in a non-critical, hopefully helpful way, that in future versions you could create different groups of stars that you know are fair, such as 2 red, a blue and a white last. Some can be intentionally more difficult, 3 reds in a row with only a blue at the end, some spaced out more etc. You can then randomise which groups are spawned and randomise the actual temperatures of each star within a range relevant to that colour of star to increase or decrease the difficulty as required. This would allow you to more finely control how the game is played whilst still giving the feeling of randomness. You would probably still get some nasty combos but it should hopefully make the game feel a little fairer.
Still very impressive for your first Godot project :)