Beatmap.hx
class Beatmap
{
    public var BPM:Float;
    public var tick:Float;
    public var prepareTime:Float;
    public var notes:Array;
    public var name:String;
    public var author:String;
    public var creator:String;

    public function new(name:String, author:String, creator:String, newBPM:Float, prepareTime:Float, notes:Array)
    {
        setBPM(newBPM);
        this.notes = notes;
        this.prepareTime = prepareTime;
    }
    public function setBPM(newBPM:Float) {
        BPM = newBPM;
        tick = BPM / 60;
    }
}

BeatmapParser.hx
class BeatmapParser
{
    public static function parse(path:String):Beatmap {
        var notes;
        var text:String = Assets.getText("data/" + path + "/notes.txt");
        var confs:String = Assets.getText("data/" + path + "/config.txt");
        var conf = confs.split("\n");
        notes = Reader.parseCsv(text, ":");
        trace(notes);
        return new Beatmap(conf[2], conf[1], conf[0], Std.parseFloat(conf[3]), Std.parseFloat(conf[4]), notes);
    }
}

Error:
source/tk/castit/arrows/BeatmapParser.hx:18: characters 9-104 : tk.castit.arrows.Beatmap does not have a constructor
source/tk/castit/arrows/BeatmapParser.hx:11: lines 11-19 : Missing return tk.castit.arrows.Beatmap