Crush Crush is a idle dating simulator. The player using a few tools to their disposal attempts to get the women from Adversary to Lover. The player completes this using various methods: clicking on the woman to produce hearts; clicking a button that either indicates Sorry, Flirt or Seduce; giving gifts; or going on a date.
Gifts and dates require currency, either money or diamonds, to complete. You gain money by activating a job or multiple jobs. Jobs are unlocked by increasing various skills. Diamonds are gained by either leveling up with one of the women, or buying with in-game purchases. Every job and skill that is activated requires time. At first the player doesn't have much time, but this is increased by completing various achievements.
As with many other idle games, there is a reset bonus. The reset bonus decreases the cooldown on various tasks (gifting, dating, etc.) and increases the rate in which skills and money are earned.
The browser version of the game includes full nudity in the game.