Endless Challenge is a new event that you can challenge yourself to pass through levels as many as possible. It's a pre-alpha version. The rules may change in the future.
In the hidden scramble challenge, the scramble is hidden and only the scrambled state is given. It means you need to clone a scrambled cube by yourself.Hidden Scramble Challenge
Every 10th level is a boss level with difficulty increased. And difficulty increases a little every 10 levels.Boss Challenge S1
Regular endless challenge with same requirements for every level.Pre-alpha