Apesar das coordenadas terem ficado um pouquinho diferentes, no final deu tudo certo :)
<canvas width = "600" height = "400"></canvas>
<script>
var canvas = document.querySelector("canvas");
var brush = canvas.getContext('2d');
//FUNDO
brush.fillStyle = "lightblue";
brush.fillRect(0,0,600,400);
//CABEÇA DO CREEPER
brush.fillStyle = "green";
brush.fillRect(100,50,350,300);
//OLHO ESQUERDO DO CREEPER
brush.fillStyle = "black";
brush.fillRect(150,100,90,90);
//"NARIZ" DO CREEPER
brush.fillRect(240,190,70,120);
//OLHO DIREITO DO CREEPER
brush.fillRect(310,100,90,90);
//BOCA DO CREEPER 1
brush.fillRect(200,240,40,110);
//BOCA DO CREEPER 2
brush.fillRect(310,240,40,110);
</script>
