If you insist on 0.20.18 specifically, download the of that version (easier to find safely) and run it on Android using an emulator like Winlator (for high-end phones) or ExaGear (for older devices).
The game was initially released on PC, but due to its popularity, it was later ported to Android devices. However, the game's availability on the Google Play Store is limited due to its mature content. summertime saga 02018 apk link download for android
(provides a history of previous stable versions if newer ones are incompatible with your device). Summertime Saga Installation Steps for Android Warning: The content provided is for informational purposes