This is a snake game.

Compilation:
    do mode
    do snake

Launch:
    start M P    , where M - text mode number, P - page number.

Сontrol:
    esc - exit
    space - pause
    left arrow - left direction
    right arrow - right direction
    up arrow - up direction
    down arrow - down direction
    a - acceleration
    d - deceleration
    w - lengthening
    s - shortening