There are 2 MODES prepared.
The difficulty level changes if you switch the MODE.
HARD mode:
Blow judgment is performed only when the position of the correct number is one digit off (adjacent position).
Blow judgment is not performed when position of the correct number is 2 or more digits off (next to next position, etc.).
STD mode:
When the correct number is not the correct position, blow judgment is performed at any position.
Tap the number,you can add a mark on the number.
The mark is useful to find out correct numbers.
Drag and drop to determine the sequence of four numbers.