the only level in "The End?", "King"  has no functional exit.

While an end-game screen can be triggered it never registers the hearts left, rendering the worlds "Harder" "Other" and "New" permanently inaccessible.

Thanks SkyCharger. I've consolidated the good levels from those worlds into a new bonus world. at the end 

Now you can finally beat the king level and get to it!

Thanks for playing!