Bulletopia v.4.5

I spent the day getting update v.4 play-tested and then I tried to fix all the bugs and add the suggestions. 

Here is what I did:

• Redid all the UI so now it actually works on devices with different resolutions
• Added instructions at the start of the game
• Added a subtle pulse animations for the big enemy
• Made the big enemy drop multiple exp when killed
• Fixed the bug that occurs when the game is paused and the restart button is clicked, causing time to freeze
• Fixed Main Menu button shaders
• Added animation for Main Menu button
• Fixed bug that causes the game to get bigger on different devices
• Added a new power up
• Change environment colors a little bit
• Changed colors for leveling up buttons
• Added animations for gems
• Fixed a TON of other bugs

Enjoy!