Stick Insect posted on 15^2 (where there was much confusion over what was to be done with "SWIFT"):
"Thanks for the feedback and sorry for the obvious annoyance of the endgame. Removing SWIFT and colouring the space red was the intended solution. Clearly that was underwhelming and something cleverer was expected, so thanks for the implied compliment and apologies that I couldn’t live up to those expectations! I hadn’t even thought of the (red) shift possibility I’m afraid. I’ll aim to do better next time."