- improve maze (ennemys / keys)
- add throw weapons by pressing key 1-9
- level increase for each stuff (stamina, life, weapon use, etc)
- chest with weapons
- add baril - explosion - droping object (life? stamina? weapon?)
- add open/close doors 
- gui  with graphic heart for life, display current weapon, etc...
- ennemys droping keys?
- lady to rescue?
- attach weapon to bone to allow chaning weapon
- toggle doors + doors animation close(open) when pressing a button
- better path (between mazes)
- añadir ventanas?
- add distinct wall mesh for outside walls
- labyrinthe 3d (etages?)
- multi player