The game may run slow for several reasons. There are a number of ways to fix the problem:
- Reload the app page.
- Lower your graphics settings in the game by choosing simple mode.
- Close any other browser tabs and/or online games.
- Restart your browser from time to time. With some browsers, the Flash plugin continues to run even after you have refreshed the page. In order to free up memory space, you may need to restart your browser.
- Try running the game with Mozilla Firefox.
- Close any download managers and torrent clients.
- Try disabling your antivirus software.
- Try updating your graphics card driver.