If you don't unlock the teleport into the Krusty Krab you can activate the cutscene with squidward by clipping through the back of the Krusty Krab. I'm pretty sure this is unintended but it unlocks sandy and when you go to her to finish squidward's objective the objective will stay, and you will start the next objective which will have them overlap. The next objective is impossible as it takes place in the chumbucket and I tried my hardest to clip inside the other parts of the chumbucket besides the bucket part and failed so i really couldn't tell you if there truly has is an end.