Anti-cheat basics for casual games
You will not stop a determined attacker on a rooted device. You can make it not worth their time, and you can make sure they cannot cash out.
A game loop that survives contact with players
The core loop is not the mechanic. It is the reason someone opens the app tomorrow, and it is usually decided before any art exists.
Frame pacing on low-end Android
Sixty frames per second is not the goal. Consistency is. A steady thirty feels far better than a jittery fifty-five.
Tuning a reward economy with real player data
Launch numbers are a guess. What matters is being able to change them without a release, and knowing which number to move.