World:Level

A level describes the y coordinate or the y axis's value of the orb spaceship. A new orbs starts at upper level 5, or +5 in short.

On each level new aspects of the game are introduced:
 * +5 = Zone Control, Charging, Mass Shield, Sancutuary
 * +4 = Anomalies, Traps, Constructs, Triggers, Destructibles, Bots, Light Cracks, Enigma, Hidden Zones, Stealers
 * +3 = Seals, Missions*, Operating Systems, Energy Stations, Stability
 * +2 = Time Zone*, Precondition modules*
 * +1 = Influence*, Virus*
 * 00 = Dark Matter, Dark Energy*, Core

* = not implemented as of 09/22/17