Here is a Squirrel made by Moiz in Pakistan.
He’s entering it in a competition at school. They’re not using the high quality rubber that comes with Squirrels but an assigned rubber band to keep the playing field level.
I’m suggesting he use lubrication to permit more turns in the rubber. Also if he were to use the 6″ propeller that comes with the kit (or another source) it may be better than that 5″ one he has. If it unwinds slower it may fly longer.