There are a few ways to enter cheats on Big Fish Casino. The first is to use the in-game console. To do this, press the ~ key while in the game. This will bring up the console window. In the console, type in the cheat you want to use and press enter. For example, to get unlimited coins, you would type in give_coins 999999.
Another way to enter cheats is to edit the game's configuration file. This file is located in the game's installation folder. To edit it, open the file in a text editor and look for the Cheats section. In this section, you can add the cheats you want to use. Just make sure to save the file after you've made your changes.