The new update has caused a lot of problems for Android users, specifically with lighting.
Innersloth is already in the works on creating an update to correct these issues.
For now, the game remains barley playable for many users and there's a simple fix. Downgrading the app back to 11.17a.
The version before the March update.
Obviously this would be temporary untill they have released the patched update.
Simply uninstall Among Us and download the file below.
Navigate to the APK file you've downloaded and install the file. Once you've installed the app, you now have the previous version without any of the issues!