The missions glitch out after Patrick once you get to the Squidward mission, and I can't advance any further. Does the game not have an end yet, or is it just me?

The game is in progress,so I don't think it will have a ending

the ride never ends

it can't end i need more

The lack of a proper ending represents Mr. Krabs crippling ketamine addiction. You can only be in a state of ecstasy for so long before the high wears off. You can play through the game again and again, but you'll never reach that true satisfaction.

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.

A new V1.21 has been uploaded the game now has an ending.