Assuming that by "floor" you mean how do you find what depth you are at in the game, the answer is simple. Hit F3 to pull up all kinds of info about your location. The depth is represented by the Y coordinate.
If you mean how can you level up your perks in killing floor? Check your perk list and on a window it'll show the requirements to do in order to level up a perk...
A dungeon in Minecraft can spawn on any level that normal land can spawn on
Let minecraft do its auto update or check the minecraft news!
The highest enchantment level in Vanilla Minecraft is level 30 through the use of bookshelves surrounding an enchantment table.
Check the Minecraft Wiki. It has information there.
Iron ore blocks can be typically found between the layers of 1-64 (64 being the sea level). If you are playing the PC edition of Minecraft, and need to check the level you're on, you can press the F3 key on your keyboard, and the "y" level number displayed on the left of the screen is your current level. Remember that iron ore blocks have a tan-ore-in-stone appearance.
The highest level of the sun in Minecraft is 12:00 PM, which is during the afternoon. (It is the same thing in reality, too!)
If you have gotten latest updates then the coordinates should be at the top left of the map when you look at it.
Check your brake fluid level in the master cylinder... you may have a leak some where
mezzanine
First thing is to check the fluid level and check for leaks. Also check the calipers and pads for proper installation and movement.
Check out the link below for a guide of how to install mods in Minecraft.