The interface of the game is pretty simple and easy to use.
It shows you lobby and 2 sidebars on the left and on the right.  On the left is a sidebar with various sections.

The tab “Heroes” is dedicated to the heroes section, where the existing heroes will be presented.

The second tab shows your Achievements, where you  will be able to see a list of quests that you’ve completed in the game and collect a reward for them.

The third tab Mail contains emails that come to your in-game mail.

The fourth tab Bank includes various offers, including Herostones, resources, event sets and Artifacts. Don't forget to check out the daily offers. Every day in the game you can get a hero stone and Dracoins currency as a gift.

The last tab Rating displays the ratings of players and their achievements.

On the right there is a sidebar with various offers that will help speed up the development of heroes in the game. However, you can advance in the game without purchases, using a well-chosen strategy.

In the lobby you can see game modes tabs. You can find out more about game modes here.