index.html code below, replace your with this one and recompile your apk.
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
// Start the Construct 2 project running on window load.
// Create new runtime using the c2canvas
<body leftmargin="0px" topmargin="0px" marginwidth="0px" marginheight="0px">
<canvas id="c2canvas" width="1280" height="800" oncontextmenu="return false;">