Peg solitaire, Solo Noble, Senku, or Brainvita is a board game involving movement of pegs on a board with holes.
Some sets use marbles in a board with indentations. And digital games as this one use colors circles.
A valid move is to jump a peg orthogonally over an adjacent peg into a hole two positions away and then to remove the jumped peg.
The objective is to empty the entire board except for a solitary peg in the central hole.
With 75 levels this is the perfect game for your brain!