<script>
Crafty.init(450,350, document.getElementById('game'));
var sledge= Crafty.e('Floor, 2D, Canvas, Color')
.attr({x: 0, y: 250, w: 150, h: 10})
.color('green');
var hero =Crafty.e('Canvas, 2D, Image, Twoway, Gravity')
.attr({x: 0, y: 0, w: 50, h: 50})
.image("jerry.png")
.twoway(150)
.gravity('Floor');
</script>
例如,在这种情况下,我如何得到一个警报,说最后一个实体,英雄已经超出了狡猾的初始化区域?