pixel_player90676085
Well, you don't explain exactly what is stopping you so I can only make some general suggestions.
If everything was working right you are supposed to leave through the bottom door (not the way you came in). Sponge Rob is initially in your way and should step away when you approach him. I'll assume he is still blocking you.
IF MOBILE
Try closing and reopening the app.
IF WebGL
From the Camp screen, switch the toggle in the upper right-hand corner to Flash and try again.
IF FLASH
Close the game, try again.
No luck? Close the game, clear the browser cache and cookies, and try again.