It would be relative easy to use a separate level per step. You could use a simple level blueprint to switch between them. Pressing ‘1’ could open the level for step 1, ‘2’ the level for step ‘2’ etc. Add the node for input key 2 and then connect it to an ‘open level’ node where you use the level name for step 2. You can copy/paste the blueprints to all levels so you can go back and forth.