Latest demo update: version 0.3.6.1

[h2] Demo 0.3.6.1 changelog[/h2]

• 🤜🤛 [Based on feedback]: When the player is behind a wall, the wall disappears in a circle so that the character always remains visible.
  
• HP crystals, chests, and Braincharge cells are now visible through walls.
  
• 🤜🤛 [Based on feedback]: Braincharge cells have a new visual effect to make them more visible, and an indicator is displayed above them, similarly to HP crystals.