Build win15 - 17.07.19

Just started looking at this for bugs and polish, changes include:

• Rewards from Robotron rooms shouldn't move horizontally anymore
• Bullets were already rotating to face trajectory, no need for mines to do this as well
• Audio sources that weren't in the correct mixer group fixed
• Mouse pointer wasn't hiding on second entry to the game
• Bouncing enemies reset when player dies
• Baby enforcers reset when player dies
• Several room layouts changed to protect player on first entry
• Several rooms env GFX tweaked
• Did a pass and put in many more score pods for players to collect
• Amended wall GFX to remove transparent pixels from edges. Secrets no long show bit of player as they move through
• Robotron Rewards don't spawn so close to room edges
• Ickle Baddie now animates and has a trail
• Added missing GFX to the port hole
• Added audio to the switch
• Fixed Scourger's bugs
• Fixed the missing sprite in Eugatron