"I Forgot Something!"
I've had that realisation quite a few times. Often 5 minutes before - or worse, 5 minutes after - a deadline. Very appropriate for a jam.
The idea of blocking some areas with sprinklers is absolutely fitting and cute. I really like the squirrel's dialogue too. If you still want to give the game some polish: I couldn't enter the screen in the far east. Nor the one with the squirrel and the acorn (after the water was turned off). A text box indicating that the water has stopped flowing would also be great.
Congratulations on your successful participation in your first jam. It's not so easy to create something presentable before the deadline. Glad to hear it wasn't your last ride. :)