Wow that looks like a tough one. Pretty far off the shore. You might need to watch the releases. If it comes up or down it may flush. Does it have your name in it and have you reported it to the police? Someone riding there bike might see it and call the police to report "A kayaker is STUCK!" If police know it's stuck in advance they won't need to send anyone to inspect. You could be changed if they have to send some to verify that no one is inside your kayak. Good luck and lesson learned... you never keep you keys in your kayak. Stash them at your car or in your PFD.
I love to dance, but who needs the music- It throws me off.