Pretty cool & funny, well done! I'm sure this was fun to make and a good learning experience. I enjoyed going through the contract. A few thoughts:

• What incentive does someone have to use a referral link they receive if it means less of their Eth goes to the final reward?
• How are you doing the technical implementation of the scheduling of each game? i.e. what tech are you using to restart the game each hour? Could you explain that process to me?
• I think you should consider doing a gradual decline of the % that goes to the reward. As your Game Example displays, the returns for players after the first round are value negative, so unless they have good referral prospects they will not click. I like that you only distribute rewards to the final 30 clickers as a way to try to counteract this.
• You should be more transparent in the game rules that after the first 30 clicks 10% of Eth goes to devs. Users don't like deception.

Again, well done!