I picked it back up based on this thread to give it another go. I'm only on world 1, but why is it when i put on wings and try to fly he sometimes stops flying mid-air (and then falls into the water and dies).
And then it took me half a dozen attempts to finish that same level because it wouldn't behave as expected and wou ld do deliberately odd things like not swim to avoid the shark or jump off the ledge when he has wings on and should fly, or my personal favourite:
On World 1-11, create handcuffs and then connect one to the star and the other to the door. The star falls through the door. Should that really happen?