Fun game but a few bugs

I finished the game and upgrades by lvl 136 and I never bought any extra lives.

The first bug I noticed is sometimes the bosses will fly off into the sky and still be able to hit you. The second bug was that when I unlocked the worminator I would get the king of the fire I till I unlocked him. Third bug is that enemies will some times fall through the map. Forth bug I was able to dig through the bottom boarder if I dug at the correct angle. Last bug is that you can flip the dragon and go through the game with an upside down dragon I till you grab a power up that changes the dragon.

Darkvengence about Dragon Hills