Additions and Balance

In no particular order:

• Addition of ability to upgrade bricks
• Balance changes to healing brick
• Balance changes to money brick
• The later the round, the stronger the balls get
• Healing, Damage, Money, and Shielding floating text
• Increased starting funds to 30

Balance-wise, I'm unsure if things have gotten easier or harder. I'll leave that to those who wish to test it out.