OBT v0.9.6 - bug fixes

On this version, I made two small bug fixes

First, the game time continued counting while in pause menu, what caused some bugs like instancing a new enemy as soon as you resumed the game, or if you paused the game in between waves you could reduce the number of enemies (this is because of the way the game updates the enemy counter between waves).

Second, removed the flicker of the enemy counter when it updated.