I've been experimenting with doing stuff based on objects overlapping objects in another layer and quickly came across something annoying.
When one layer is set say.. to not scroll (like an overlay/hud layer) and you move around on the game play layer, collisions only occure where the objects would be if the layers scrolled at 100%.
This doesn't seem right and I would guess it to be a bug, but theres also the possibility (as is common with construct) that it's intentional and I'm missing the setting that'll make it behave accordingly.