Can a certain level change according to events in other levels?

[Dinossairo]

I am making a game with a free account so the 5 level limit is kinda frustrating, but I think I found a way to work around it but I don’t know how to do it. What I want to do is let’s say in level 3 you grab a key that’s supposed to open a door in level 2, which is the hub in my game, how can I do this? I tried mailboxes and messages but it’s not working, any ideas?

[BradenS]

Use the Global behavior. It can save values throughout levels.

[Hong_Jooni_Pooni]

New users info and tricks

Here is a place to put things that the average/new user would not know, like, for me I just realized today that in the camera behaviour, to go left and bottom you have to put negatives… that used to annoy me why I couldn’t change the boundaries of a camera, I’m dumb anyways, that’s the start, so when there’s a new user, they can just check here and see stuff ( feel free to add your tips and suggestions so this grows. @CodeAlpaca

[Dinossairo]

Thanks, now it works like a charm

[CodeAlpaca]

As BradenS said, use globals. Messages can only be sent to objects within the current level.
However, Global values stay between levels.

So to unlock a door in level 2 from a key in level 3 you would

1. Collect key → set Global to 1
2. In level 2, have a Once connected to the Global.
3. Put the output from the Global into a filter. If it equals 1, unlock the door.

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Side note: consider using the Save behavior so it can save between play throughs