Performing a duck-jump is simple. Instead of jumping from the standing position, jump while ducking and continue to hold the down button throughout the jump. Releasing the down button mid-jump will return Hannah to a standing position. A standard jump cannot be changed to a duck-jump midair.

##Duck-Jumping through small gaps

Duck-Jumping allows Hannah to jump through 1 tile gaps. Upon landing on the edge of a tile she will enter her duck animation and can safely crawl through.

An example can be found in Tutorial 3. By only breaking one crate and then duck-jumping, Hannah is able to move through this area faster.

##Duck-Jumping to avoid spikes

A standard jump will move Hannah 5 tiles vertically, but a duck-jump will only be 4.5 tiles high. Since spikes are a half tile, Hannah can safely duck-jump while underneath a spike 5 tiles above her. Normally such a jump would be fatal.

An example can be found in Level 1.