WOW this gives me very mixed feelings. I spent so much time on levels 7&8, I started having doubts in my mental capacity.
When I concentrate on finding the repeating geometrical shapes - each level becomes easy to solve. The ticking sound and timing puts pressure which makes me fail multiple times even after I have the correct idea.
It is difficult for me to make a plan without seeing the whole path to the next checkpoint. I also can't help but see as a failure every return to the starting point. These 2 ideas translate into a guaranteed minimum amount of frustration when a level extends outside of the screen.
I both love it and I hate it.
Looking forward to feel stupid again!