Updated
I don't like to repeat this, but please do not abuse if you want to be safe.
Use only minimal features like no ads, low multipliers, and do not progress like The Flash.
Imagine you are the game developer, you invested money and time to build an Online game and players ended up abusing and beat the game in no time, those players that spent money to support the game are outranked by mod abusers. Now, what would you do? Close both of your eyes and believe everything is fine, or would you check if those players are legit, whether they spent money etc? Think again.