I tried to copy paste over a specific tile in the second layer on the attached .xp file and it seems that confused RogueP enough for it to red screen of death (and then proceed to close before I could catch the error). http://prntscr.com/8dq00v copy the circled tile (just some random empty square i grabbed) and paste it onto the tile i pointed at with a bunch of arrows, and it should crash 
(enjoy the title screen draft, by the way)
Edit: Okay so copy pasting (and honestly, sometimes, trying to draw) is pretty flaky in this file o.o Not sure what's going on, and I can't find a consistent repro for anything other than that. And apparently I uploaded a log without the error -.- oh well, hopefully the one repro i could find will help.

(enjoy the title screen draft, by the way)
Edit: Okay so copy pasting (and honestly, sometimes, trying to draw) is pretty flaky in this file o.o Not sure what's going on, and I can't find a consistent repro for anything other than that. And apparently I uploaded a log without the error -.- oh well, hopefully the one repro i could find will help.