How do I make an inventory like in minecraft?

I have been working on an inventory for awhile, and found a minecraft type inventory system is most suitable, But I dont know where to start.

I never played minecraft - can you describe how their menu system works?

Minecrafts inventory is just like any other inventories... There's already a bunch of Tutorials about it and a lot more posts with example files, just use search to find them.

I never played minecraft - can you describe how their menu system works?

Basically when I pick up a world item, if there is no existing copies in the inventory, or if there is, and the stack is not maxed out, it adds.

https://www.scirra.com/tutorials/583/ea ... g-an-array