Status Bar
You can see your Level, Energy, Star and Gold quantity in the status bar at the top of your game.
Game Board
Game Board is the place where merge your items and complete your orders.
You can open your game board by clicking the 'Play' tab at the bottom of the screen.
Item Queue
Item queue is right under your game board and it is the place where your prizes and purchased items are waiting for you.
You can tap on items in your item queue to place them on your board.
Customer Orders
Customer orders are the only source for the stars. You must complete the orders to collect stars.
To complete an order, you need to create the requested items by merging. You can always check the item chain by tapping the item itself in the order.
The orders will have a tick button on them once you prepared every requested item. Tap on the 'tick' button, deliver your order and earn coins. If you want to see all orders, you can always scroll left and check them.
There is also another indicator both on order itself and the board for the order status. If you see a green base behind the order, it means you already have it somewhere on your board.
If you see a tiny green tick on the bottom-left corner of the item, it indicates that this item is requested by one of your orders.
Brown Boxes
You have chained items 
and brown boxes 
on your board at the beginning of the game.
To open these boxes, you need to merge your items near them. The brown boxes contain chained but valuable, including level-1 producers, items.
Chained Items
You have chained items and brown boxes on your board at the beginning of the game.
You need to merge your items with the chained ones to break the chains. Or, you can use your gold or chain breaker 
to break the chains on the items.
Energy Refill
In Mergedom, you gain one free energy every two minutes. If you click the '+' icon under the energy bar, you will see a pop-up that offers you two options to refill/gain your energy.
You can refill your energy by using your Gold, or you can gain free energy by watching an ad. The energy you bought or earned automatically adds to your energy bar.
Bubbles
Bubbles are created when merging two items, and they contain an extra of the newly created item. You can pop a bubble by using your gold and get an extra high-level item. Some of the bubbles can also be popped by watching an ad.
You have one minute to pop the bubble. After one minute, the bubble pops itself and leaves gold coins behind. 
