Do you remember the 4x4 puzzle where you have to tidy up the numbers? Very easy in comparison...
With the level 10x7 obstacle will need thousands of moves to get everything back in order!
So make sure have a lot time and patience :)

In the free version:

Level 1: standard 3x3 table
Level 2: standard 4x4 table
Level 3: standard 5x5 table

In the paid version:

Level 4: 5x5 table with 1 obstacle
Level 5: standard 6x6 table
Level 6: 6x6 table with 2 obstacles
Level 7: standard 7x7 table
Level 8: 7x7 table with 2 oostacoli
Level 9: standard 8x5 table
Level 10: 8x5 table with 2 obstacles
Level 11: standard 9x6 table
Level 12: 9x6 table with 4 obstacles
Level 13: standard table 10x7
Level 14: 10x7 table with 4 obstacles