You could be facing this problem due to one of the following reasons:

1. Cache error - This website shows you how to clear your browser cache.

2. Flash not installed - Get the latest Flash player, it's free.

3. Browser zoom - Always set the zoom level to 100% or the default setting. Zooming in can cause the game to not load properly.

4. Restart browser - In some cases, restarting your browser can fix the problem.

If the above solutions don't work, try Google's Chrome browser - Lexulous works best with Chrome as it has Flash pre-installed.

In case you're already using Chrome and the solutions mentioned are not working, please send us a screenshot  along with a detailed description of the problem you're facing.