All the games on CW are designed to be similar to a real casino. They are not meant to help you progress in the long run. There are some games that do have a player’s edge, like Jewels of Osiris, Mahjong, and Blackjack (if you play correctly with a large coin balance to handle the swings).
The only way you can consistently progress is to always use charms. Be sure to use the correct charm for each type of game, along with the right clover for your bet size. Different charms perform better on different games in terms of your payout ratio. For example, Spark Plug pays out 200:1 if you use Unicorns. That means if you win 500K, all 4 sets of Unicorns will cash out.
Make sure to manage your city and tend to your Treasure Box. Your Treasure Box is where you will get the most passes to attend parties and load up on charms. Always stock up on charms before playing any game - don’t test your luck by thinking this time will be different!