Here are a few options for the post, depending on where you are posting it (e.g., a gaming forum, a Discord announcement, or a social media channel).
Enable "Unknown Sources" in your Android security settings to allow the installation . Here are a few options for the post,
Explore Challenges: Use your god-like power to clear the hardest challenge towers and boss rushes that are usually impossible for casual players. How to Install (Safely) Not intended for multiplayer or ranked play