let mode_study = new Mode('check map tiles for messages', false, true);
let mode_edit = new Mode('write ASCII char to map tile', false, false);
let mode_teleport = new Mode('teleport away?');
let mode_study = new Mode('check map tiles for messages', false, true);
let mode_edit = new Mode('write ASCII char to map tile', false, false);
let mode_teleport = new Mode('teleport away?');