It is really an awesome game. Unfortunately, I am using my laptop and I do not have a mouse. But I still managed to reach level six and scored 28. I liked the idea of having many coins, not just bitcoin. Plus, everything went smoothly and the site is secure. I totally recommend giving it a try.
On the other hand, you could make your project bigger by adding some prizes. For example, you can hold a competition for users. Each user bets with a small amount of bitcoin. And the one who makes the highest score wins the bet. it would be more fun if you ask me.
Money involvement would be possible but yet it would already be called as gambling site. If this site created solely by OP for entertainment then he wont really bother to add up some money on it.By the way I cant imagine how you reach out level 6 by just using laptop pad. lol
Any easter eggs in this game?

Tried clicking everywhere but was unable to find it, but I'm sure (want to belive) that there are some!
Why would ask for a seasonal game? Its obvious that you cant find it since the game was solely created for catching up those cryptos.