Level up system

Please add a level up system in Minecraft. Where you start out at level one to level hundred. the more you level up is the harder you die with or without armor. You would level up by killing mobs. Not like the experience thing that decrease when you enhant something. And also to add a stats button on the screen so you cab view your stats. For example the neither world which is very dangerous, you would have to be over level 50 to enter.... Add Minecraft pocket edition and the others