Cosmo can be used as transport even with out being in a cave just jump off a high cliff aim down shoot your web at the ground and jump to fling your self up and in the direction of your momentum. If you need to change direction use right click (alt attack) while looking in the direction you want to go and it will pull you that way. The alt attack pull does not need to be attached to anything. Keep an eye on how many webs you have so you can hit the ground safely.