Coursera 2D Platformer (Tirasz)

Modifications:

- Created new "Portal" entity, this includes:
  - New (animated) sprites with animation states
  - New sound effects triggered by player entering portal
  - New scripts to teleport the player and trigger sound effects and animations
- Created new level showcasing the new portal entity. 

Created by:

 Rózsa Balázs (YCW3LU)