I see lot of the comments posted above address the current problems you have but no one really gave you a solution. The cheating problem exists, Yes! Can it be solved? Obviously! There are a lot of ways, you can prevent a bot from accessing the game or pretending to be a user. Something as simple as a video must be important for both the users playing the game or you run your game into an Iframe with secure inputs or dynamic html tag names to prevent it from bots.