Missile Command Prototype v0.2.0

MISSILE COMMAND PROTOTYPE v0.2.0

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++ADDED / FIXED:

-Added main menu.

-Added splash screen

-Buildings will now properly count down when they are destroyed. 

**KNOWN ISSUES / WIP:

-Currently working on a level system so the round will properly end after a certain amount of missiles are destroyed. 

-Currently no end to game unless the player clicks the exit button. Will add a return to menu button at a later date. 

-Game will not end if all building / player cannon is destroyed. This should be fixed later with the addition of the levels. 

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