As many other have said, this looks similar to Trello. It may be worth looking into how they have their UI set up.

Noticeable differences - In trello, the button which will action something is located close to where you would expect the result.

eg. The new card functionality is at the bottom of the column, the new column functionality is in the top right. Further "more advanced" functionality is hidden in drop down menus for which the indicator appears on hover.