Overlap issue

FF1FF1

Hi, im so close to having a full prototype game. (Thanks to everyones help!)

My ball actor changes image when going over two power-ups. (Fire & Ice)

However when the power-ups are too close game-salad doesn't register it perfectly...

So is there a way I can force certain actors to say a certain amount of space away from all sides? (Which would make the change image more accurate)

Thanks.