If you find a bug you should report it on Kongregate.com so that the developer can fix it.
However, there can be several other problems.
Problem: I can't play the game. It says "DOWNLOADING DATA... (13849128/13849128)"
Solution: Restart the browser.
Problem: The ad forwards me to another website and I don't get any rewards.
Solution: Deactivate your adblocker for the website (and for kongregate.com).
Problem: The ads don't appear. I am using Google Chrome.
Solution: View the guided instructions of Kongregate: How To Make Flash Really, Actually, Truly Work In Chrome
Problem: The screen is black.
Solution: Below it should say "Your game will start after this message (close)". Click on "close".
Problem: The game runs slowly.
Solution: Close other programs (e.g. browsers). The game seems to run slowly when Firefox and Chrome run simultaneously.
Problem: I can't play the game because my browser blocks WebGL.
Solution: Enable WebGL. There is a guide on superuser.com: https://superuser.com/questions/836832/how-can-i-enable-webgl-in-my-browser/836833#836833