I suppose your right, with all the jelly droping big jellys following you around i imagine its impossible to find yourself needing the jelly and not being able to get one. But anyone playing this is going to go for speed, so they arn't likely to activate them all. I suggest you have the drop item / die event on all of them, if people find themselves at a point where they can't progress from killing them all, then have a way to respawn all the enemys. Maybe chaco and a bed spawn and you take a nap with her or something silly... sure it'd respawn all the enemys and screw up your time, but your not getting a good time anyway if you mess up with the jellys.
Oh, btw curly should be shooting a polar star if you have the machine gun, and i've only gotten the beast fang so far. Trying to get a good time, but keep dying.