How to access my balance history?
Edited
You can access your balance history with the following steps:
Click on your profile picture on the top-right corner of the screen;
Click on Balance History;
The information is displayed as operation amount → balance after operation.
The first row of the example above can be read as: the win brought 100 Blitz coins, for a total of 352 Blitz coins in the balance after the game.