early missile expansions: gel hall
Space jump to the missile to minimize the fuel gel damage. When you reach the ledge, morph and put your back to it. With the ledge roughly in your center, do a spring-bsj. The spring ball will get very little height but will get you out of the fuel gel, allowing your space jump to reach the ledge.
To avoid taking too much damage, try not to stay in the fuel gel more than 3.5 seconds at a time as you prepare for the spring-bsj. The damage rate is relatively slow until then.