HUGE DEMO REVAMP

Well, it is now a time to list some fixes:

• Fixed softlocks
• Added shop (accessed through map)
• Revamped music
• custom cursor is removed due to its horrendous issues in UE4
• Squeezed borders a bit
• optimized graphics (they are pretty same tbh)
• Complete overhaul of Alterios (first boss)
• and of course, new options in main menu (coop related but they dont do anything at all)

Just wanted to say thank you for playing this wonderful game! Any kind of feedback is greatly appreciated!