Level progression incoming!

Todays update is the first of many to implement the level system, this one focuses on spawning units in waves, and allowing the player to start the next wave upon completion of another one with the use of a button! Its a simple system, but units will get more hp and spawn faster based on the current level the player has reached (tougher enemies also spawn)!

More will add to the depth of these waves and balancing will be done once the system is fully implemented and tested!