You will find the control panel at the bottom of the screen. There are labels for Win, Balance, Total Bet, Autoplay, Spin and Bet-Per-Line. There is also a button that you can click to view the payment form and a gear that represents the settings control.
The open shell icon is a scatter plot. There are three glittering pearls in the middle of the shell, two 20, three 50, four 200, five five thousand. It's also related to free spins; all you have to do is land more than three times and win 15 free spins. Not only that, all the wins in the free spin are multiplied by 3.