How do I make drag and drop not crossing solid walls?

Just a small question I wanted ask.

Thanks for the answering!

Neverming I just got it (it's when sprite 1 is overlaping with walls --> sprite 1 drop drag n drop right?)

EDIT: It doesn't work when you drag them fast, if you do they just bypass walls and stuff

I would try on collision or is overlapping at off set = drop. also check your collision area