I play Nyancat
Yeah, I've tried nyancat aswell. Even though I had a great experience there, I'll rather wait until nyancat will be released.
This will take two months for nyancat to come out of beta, at most. That is what the founders said.
In my opinion there's no need for waiting because the leaderboards are already running one by another and you are going to miss them.
Trust me if you are going to play nyancat anyway you better start playing right now and gain some experience for yor cats, otherwise you not going to be able even to take top-10 of leaderboard with your default cat.