Sorry! That’s a debug feature I forgot to remove, thank you for letting me know, it is removed now. Holding “X” while screen transitioning is how I created new levels while working on the game.
The neighbouring tiles in this game are actually just duplicated (i.e. all screen transitions are 2 tiles wide/tall). The way you did it in Derelict Star is genius, I wish I’d thought of your solution!
Thanks for playing, I really love Derelict Star & all your other games 🙂