Update #0.15 - A Bunch of QoL Features

Added:

• Tooltips
• Settings Menu 
• Saving System
• Houses now can become abandoned, so you have to demolish them
• New minecraft-like soundtrack
• Camera movement with both "WASD" and arrow keys

Balance Changes:

• Shops now produces more money (per house):
  • Tier 1: 4 $/s --> 5 $/s
  • Tier 2: 6 $/s --> 7 $/s
  • Tier 3: 8 $/s --> 10 $/s
  • Tier 4: 10 $/s --> 14 $/s 

Fixes:

• Now you can't accidently destroy or upgrade a building, when you place another one