Going further
If you are adventurous, try expanding your project to add the following features:
Add the inventory menu to the battle scene, as previously discussed.
Use a scroll bar to allow the inventory menu and shop inventory to exceed the current view.
Group similar inventory items together by showing a single image with an item count.
Add scripts to the inventory items to allow them to affect the player's health.
Have a go at adding money into the equation by making things cost money. In the purchasing section, display and act on it if the player does not have enough.
Put a second view in the shop to allow the player to sell items back to the shop.
