Comment by kazinator

You can make easy mazes harder with extra distracting visual clutter:

E.g. this:

  +-- -+----+----+----+----+
  |    |    |    |    |    |
  |    |                   |
  +-- -+-- -+----+----+-- -+
  |    |    |    |    |    |
  |         |         |    |
  +-- -+----+-- -+----+----+
  |    |    |    |    |    |
  |              |         |
  +-- -+----+-- -+-- -+-- -+
  |    |    |    |    |    |
  |         |         |    |
  +-- -+-- -+-- -+----+----+
  |    |    |    |    |    |
  |    |    |              |
  +----+----+----+----+    +

Is just this, with extra wall material in each cell, reducing the aperture of the passages:

  +    +----+----+----+----+
  |    |                   |
  |    |                   |
  +    +    +----+----+    +
  |         |         |    |
  |         |         |    |
  +    +----+    +----+----+
  |              |         |
  |              |         |
  +    +----+    +    +    +
  |         |         |    |
  |         |         |    |
  +    +    +    +----+----+
  |    |    |              |
  |    |    |              |
  +----+----+----+----+    +