At each level the country outline image is hidden behind the black area in the playfield.
Erase it (entirely or partially) by moving the cursor, then choose (click) the correct answer in the bottom.
Be aware of the enemies (white balls and black squares)! Don't touch them, otherwise the game will be failed (after 3 collisions).
Control keys: Up, Down, Left, Right, as well as mouse click (tap on touch devices) anywhere in the playing field