Fejl i koden - ingen hitTest

I følgende kode er der ingen reaktion på hitTest;
alt andet virker.

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level = 0;
levels = 0;

array = new Array(100, 100);

left = 65;
right = 68;
up = 87;
down = 83;

setup();

function setup() {
    createEmptyMovieClip("particles", 1);
    attachMovie("player", "player", 2);
    attachMovie("level"+level, "level", 3);
    attachMovie("interface", "interface", 4);
    player._x = array[level+levels+1];
    player._y = array[level+levels+1];
    xspeed = 0;
    yspeed = 0;
    setInterval(game, 15);
}

function game() {
    if (Key.isDown(left)) {
        xspeed --;
        if (player._currentframe >= 1 && player._currentframe < 9 ) {
            player.play();
        }
    } else if (Key.isDown(right)) {
        xspeed ++;
        if (player._currentframe >= 9) {
            player.play();
        }
    } else if (xspeed < 0) {
        xspeed = Math.min(xspeed+.5, 0);
    } else if (xspeed > 0) {
        xspeed = Math.max(xspeed-.5, 0);
    }
    if (Key.isDown(up)) {
        yspeed ++;
    } else if (Key.isDown(down)) {
        yspeed --;
    } else {
        yspeed -= .5;
    }
    xspeed = Math.max(Math.min(xspeed, 25), -25);
    yspeed = Math.max(Math.min(yspeed, 25), -25);
    if (level.hitTest(player._x, player._y, true)) {
        attachMovie("explosion", "explosion", 10);
        explosion._x = player._x;
        explosion._y = player._y;
        fscommand("quit");
    } else {
        player._x += .05*xspeed;
        player._y -= .05*yspeed;
    }
}

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Hvad er der galt?