Thank you very much for the kind words! I'm glad you enjoyed the relaxed pace of the game. I actually don't have much experience playing candy crush or other match-3 games so I tried to code the battle system without any preconception, so being able to swap any 2 orbs is indeed by design. It's not explained anywhere, so it may not be obvious enough at first glance.
Thanks again, I really enjoyed your game, too!