Demo Update 0.1.13 - Water And More!

The subways are mostly done now in the playtest, and I also did a lot of quality of life improvements so I decided to update the demo too! While I don't plan to add more content to the demo, I did add a river of water that will spawn in a new save (and shows off the new water mechanic).

Changelog that affects the Demo:

• Added water and an underground river
  
• Added buckets
  
• Added footstep sounds
  
• Added a clear option to the painter to remove paint
  
• You can now climb ladders from any direction (even if the ladder is behind you)
  
• Adjusted the shield so it no longer works with 0 power
  
• Other adjustments and minor improvements