Thanks for your comments, I am glad if you had a good time!
I was trying to create a puzzle experience that's somewhat "half-predictable". In my initial thought, the player can basically predict where the portal leads with the hint from color and porting direction. In some occasions, the portal might teleport the avatar to a total strange place to start a new adventure, which actually would later turn out to be closely connected in the whole map.
Apparently, more work is required for me to achieve the initial motivation and goal.
Thanks again for your play!