Update 0.7.8

This update contains the following:

FEATURES

• Added background scrolling
• Added a new alien (Elite Alien)
• (Survival Mode) Added NIGHTMARE!-only abilities to Armored Aliens and Elite Aliens
• (Survival Mode) Clearing a wave increases the score multiplier by 1%

GAMEPLAY

• (Survival Mode) Difficulties have been rebalanced
• Some alien groups have been changed

VISUALS

• Renamed Standard Mode to Campaign
• Renamed Endless Mode to Survival Mode
• Renamed "Level Progress" to "Current Level" in Campaign Records menu
• Changed Main Menu background
• Changed Campaign Completed background