At the start of the game select a difficulty by clicking on a button or by using the slider (the lower the harder). Control the night throughout the castle grounds using the arrow keys. Collect the brain power (orange), but don't collect more than you can hold! The higher the numbers next to the brain powers, the more brain power you need to hold it without a brain overload. The anti-brain power (red) will make you rapidly lose brain power. Don't let this happen!
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