v0.1.50-beta

• This is a beta release to find bugs.
• Edit assets under gshtml5-win32-x64/resources/app/assets directory.
• Bugs fixed:
  • Particle Wrapper now supports emitter tween and hue filter for particles.
  • Many bug fixes related to Particle Wrapper.
  • Allow to set opacity in a Tiled tile layer.
  • Created new property for NPCs: allow_only_front_interaction.