Summarize the following:
Letting air out of your ocarina through points other than the sound hole will affect the pitch of the whistle. A controlled way to do this is to lift the four fingers on your right hand up and down, mimicking the motions a flute player would make. Lift a maximum of two fingers at once — the more ways there are for air to escape, the harder it is to get pitches. Note that this is difficult to do without causing your whistle to turn into an undesirable "rushing air" noise. You'll need to keep a good seal between your hands, lift your finger only slightly, and support the note with plenty of air. It can take as long to learn how to do this as it takes to learn how to make the whistle in the first place. The pitch you hear when you get a whistle out of a hand ocarina is the air between your hands vibrating. Creating a bigger or smaller space by changing the shape of your hands will let more or less air in, affecting the pitch. Just be careful to keep a tight seal between your hands so air can't leak out.  Making a bigger space (moving your hands apart) will produce a lower-pitched sound. Making a smaller space (moving your hands together) will produce a higher-pitched sound. Changing the way you blow can also change the pitch of the note your ocarina makes. Try making a smaller "o" with your lips for a higher pitch or a larger "o" for a lower pitch. Experienced harmonica players use a technique called a "draw bend" to change notes' pitches. You can get a similar effect by pulling your tongue to the back of your mouth as you blow to "bend" the tone of your note downwards. This takes practice!

Summary:
Try lifting your right hand fingers. Try changing the space between your hands. Try altering the posture of your lips.