Shop section of the game is the main place to purchase weapons, armors, usable items, and boosts. You can enter the Shop by clicking the link in the main menu.
All the items in the Shop are split to several item groups - Swords, Daggers, Potions, etc. The groups are displayed on the main page of the shop. Click the icon of a group to open it.
Items in the shop are being unlocked at almost every level. Groups are being unlocked when items belonging to these groups are being unlocked. To unlock the items you should reach a certain level. As soon as you reach the level you'll see a message about these items being unlocked in the level up notification dialog.
Purchasing Items
You can purchase items in the shop by clicking the 'Buy' button. Item can cost either gold or gems. All purchases made for gems will ask for the additional confirmation.
Some items (such as potions) are usually purchased multiple times and for such items the additional amount selection dialog will appear. In this dialog you'll be able to select how many of the item you would like to purchase. All purchases of more than 5 items will ask for the additional confirmation.
Some items (such as boosts) are only allowed to purchase in packages. For such items the price is always displayed for the whole package, package size is also displayed. For example, "Potion of Petrifaction (pack of 10)" means that you purchase the package of 10 potions of petrification, the price is displayed in the shop is for the whole package, not for a single potion.
After a successful purchase you'll see the result message displaying how many of the item you've purchased and how much gold or gems you've spent.