Install the following DLC to unlock some levels required for some achievements.

https://psteamproxy.yuanyoumao.com/app/1195840/Starlight_Lover_DLC/?snr=1_5_1100__1100&utm_source=steamwidget
Complete the 10 levels by collecting 5 yellow stars in each.











Repeat the first stage and collect 100 blue and green stars and 20 white stars. White is the rarest and it will take a little patience until they appear.










A heart button with DLC near each stage will be available on the selection screen. Complete the levels by clicking on the girl until the meter is full.

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