Small Update -- Still Refining!

Another update to make Sun Escapes Me to add some quality of life improvements and hopefully enhance gameplay:

• Added Invulnerability State so you aren't killed in 3 seconds and you don't know what happened.
• Added some invulnerability at the start of the game to give players a chance to get their bearings.
• Made the bullets larger and more fun to look at. 
• When bullets "bounce" off the nebula, they will now flip directions to make it look like it coming for you!
• Added a gradual spawn rate so the difficulty should build over time.