Quick answers while I download your capx.
For every level create a global variable, level1score,level2score, etc.
Create a globalvariable totalscore and set it to level1score+level2score+.. etc.
You could have your animation play on isdragging, but I guess you'd want the player to face the direction of the drag. This can't be done by just the drag&drop behaviour, so it would be easier to drag an invisible sprite and give the player bullet-behaviour aim it at the dragging and move in the direction of the drag and use bullet behaviour speed is not 0 for doing the animation.
There are other solutions, but this one comes to mind quickly.
ok, download complete, let's check.