So when you get any of the elements (so in your case, air or water), you can hold the absorb button, which spawns a triangle above you. Absorb another ability (so ANOTHER air, water, or other element 👁️), then touch the triangle. Doing this fuses the abilities, though ik it's not explained well. I'll try to tinker around with the camera a bit more, I know some other people had issues with the camerawork. Thank you so much for playing!