Hi Cristina Maria (that's a pretty name, BTW - my DD1's second name is Kristina).
The roller coaster is obvious symbolism, really, you feel you are on a roller coaster with life and your emotions are going up and down and all over the place.
The beach is a spiritual symbol - it's a kind of transition point between Earth and Heaven - this means your physical self is uniting with your spiritual self more. You are thinking more deeply about your life.
The pathway is your path in life, your future that you have to look forward to.
