Found the issue that was causing this to happen sometimes and it should work now in v1.1, thanks again for letting me know about this!
Much better! I was able to get the turtle all the way to the party this time, which was as cute as I'd been hoping. :-)
Actually, it took me a couple of tries to do this. The first time I missed that I had all the planks that I needed to create a bridge over the rocks so I went all the way to the right, dropped off the presents, and the game told me I'd won while my turtle was still waiting to cross the rocks. I'd suggest having the game win condition trigger when the turtle arrives at the end, not when the player arrives. (Also, my wife suggests that when your turtle arrives he should get a birthday hat, but that is optional. :-) )