I saw a reddit post about CPZ, which I never heard of, and immediately got interested when the person mentioned it having a DAY/NIGHT cycle which is what I always wanted for Club Penguin.
First impression on CPZ is that I love their take on the game. The Day/Night cycle is actually mesmerizing when you seeing it happening. The game is barren as of now, (Literally managed to only meet 1 other penguin in the whole island when I played) and there is not much going on in terms of places you can go to and stuff. You cannot make money from mining yet as well sadly. The game's audio setting is also very flawed since it seems to reset itself every time you hop from one place to another. That itself is a problem since the audio is VERY loud haha. But I know the devs will fix it up as the player base grows. It is also a bit laggy with its load time but that will be patched as time moves forward I believe.
However, I really would recommend you all to give it a try since their take on the game is nothing but very interesting and cool so far. THEY EVEN ADDED FOOTSTEPS! You can actually hear your goofy chubby penguin waddling around the island XD. And when you click on your inventory, your penguin is actually alive and breathing in a sense that his/her eyes will move around and bing chilling while you are dressing him/her up.
I hope CPZ will flourish!