Never been a big fan of wrpg's but this game I'll definitely buy.
But I don't really think it will be released this soon. I think it will take some months more.
Make another parent that isn't used in game and make all 3 have that as their parent and don't change which object you're checking for in place_meeting
I also tried to make a new obj_block, so the slopes could use that as a parent, but that didn't work either...
Well, I don't remember why it didn't work. I can try again later...