Version Alpha 1.6 - Dungeon generation improvement

I worked on dungeon generation:

• Conflicting rooms neighborhood
• Missed dead end

Additionally I fixed HUD's behavior, disabled enemy and added debug controls. 

Debug controls:

• ` - noclip toggle
• Q and E while in noclip - Up and Down
• Shift in noclip - increase movement
• R - regenerate level

Feel free to test generation and report bugs.