Nice first track man ! I've always wanted to extend it, you did it for me ;)
Just a quick tip for your next tracks : since you've changed the tempo, the piano sounds a bit out of tune here. i think you can hear it. To fix that, you can use the timestrecht tool of AT. You just need to right-click on the piano loops and select 'change playback mode'>'timestrecht' (default setting is 'pitch'). You can use this for small tempo change (not a big one, it often affects the quality of the sample).