We've seen this concept many times before.
1. Black squares can be crossed many times.
2. Gray squares must be crossed twice.
What could be better:
The game board utilizes a small fraction of the screen. I'd like the option to enlarge this.
At first, I had some trouble seeing the areas where I couldn't roll the cube. It would be great if the entire board could be rotated.
Look at the first image. See the white pillars? That should be a different color.
There are 70 levels. Last night I was on the phone for almost an hour and tackled about 40 levels. I ended at level 58. Had the phone conversation gone another 30 minutes, I think I could have completed them all. The puzzles are not too hard.
There is a Leader Board for Cubiques. Which I don't fully understand. I'm # 160 out of 3700 on the levels. But on the Points section, I'm around 15. I'm guessing that the points accumulate by solving the puzzles in a short time and/or solving the levels on the first or second try.
Announcement: Subway Shuffle is going to reappear one of these days. The old version no longer works on iOS 11.