Here is the full list of all 32 Starlight achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Collect 100 Green Stars
Collect 20 White Stars
Collect 5 White Stars
Collect 100 Blue Stars
Collect 50 Green Stars
Collect 1 White Star
Collect 50 Blue Stars
Collect 100 Yellow Stars
Collect 10 Blue Stars
Collect 10 Green Stars
Date With Girl NO.10
Date With Girl NO.9
Date With Girl NO.8
Date With Girl NO.7
Date With Girl NO.6
Date With Girl NO.5
Date With Girl NO.4
Date With Girl NO.3
Date With Girl NO.2
Date With Girl NO.1
Stage 10 Clear
Collect 50 Yellow Stars
Stage 9 Clear
Stage 8 Clear
Stage 7 Clear
Stage 6 Clear
Stage 5 Clear
Stage 4 Clear
Stage 3 Clear
Stage 2 Clear
Collect 10 Yellow Stars
Stage 1 Clear