Help! Closet for boys room need shelving/drawers BUT huge empty space inside door cavity!

Help! Closet for boys room need shelving/drawers BUT huge empty space inside door cavity! imgur.com/a/dxSTegE Any good ideas on how to design this closet so we can access the empty dead space inside the door cavity that is so large!!! Without wasting too much of the precious small room we have for this bedroom closet? top shelf has to be shallow enough to allow big plastic bins up there? or maybe top shelf is adjustable so it can go up and down? im open to any ideas? This is a DIY thing Ill be buying online/ikea/homedepot. preview.redd.it/t38n3kytumdh1.png