Simple cave story like inventory

I've made a super easy inventory using the list object.
There are two frames: The first shows the basic concept using 7 events, and the second includes a inventory selector.
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The items, or numbers, are all instances of the same object displaying a certain animation representing an item. So the way it's set up you can add as many items as MMF support animations for a single active object. I don't know if there's a cap on animations, but I guess I should have designed it another way. It's easy to tweak.

The animation for each instance of "Item1" are controlled through the list object.
1 = "Item1" animation 12
2 = "Item1" animation 13
3 = "Item1" animation 14
etc.

To add another object to be available in the inventory (a 4th item):
Add a new animation for the "Item1" object. Make sure the animation is looping.

Changing the initial inventory
Open the list object and change the numbers. Separate items in inventory with a line. If you've created a new animation for "Item1", you may add the value "4" and the instance will display Item1's animation 15.

The numbers on the list will render onto the inventory in the same order it has been added to the list.