Click an empty position to place your man.
A move consists of walking across empty positions until you encounter an obstacle. If this obstacle is a coloured square block you must walk onto the block and thereby eliminate it.
In the next move you have to turn 90 degrees (left or right) to either side.

You are not allowed to cross your own path.
You cannot step onto a position you have been to before.

You win if you eliminate as many blocks as given at the top border.
Solutions are attached. All solutions have been found by hand; hence you might be able to improve on them.

When SmartMoves is activated, you simply click the target position to move your man. Activate it via View/Options/Board/SmartMoves.

There are also ten randomized variants attached.