GMS 2.3+ I want a winstate to happen when an object overlaps another object, what's the best way to go about coding that?

Hello, Gamemakers.

I am an extreme noob who just downloaded GMS2 yesterday to make a prototype, and have with help from a tutorial made a basic platformer. However, I want the game to acknowledge success when two Objects (the creme "cat" and the chocolate "cat" in the picture) overlap each other within the room and send the player to the second Room.

Also is it possible to designate a place within the room as the success location? I suppose a box without collision is the way to go?

Thank you for reading my post, will appreciate every input. Will also take links to relavent video tutorials...