After a year I didn't notice that you can't get any further from level 10.
I have now fixed this and all levels tested several times
there were 3 erroneous levels where i misplaced a block.
I'm sorry I didn't notice
Thanks to three people from the community hub who pointed this out to me.
There is a temporary test achievement please let me know when you enter a new level.
If you don't get one, it's because of the code.
1.0.1.4 - Charly