Would like an option to just double click the arrows to add them to the queue, dragging them over every time is fiddly and unnecessary. There are keyboard shortcuts but they need better explanation; it took me a while to figure out I needed to press space to select a track even when there was only one available. It would be great to be able to go to the next level by keyboard as well. Also the children cheering is really annoying to hear repeatedly as well. The game itself is decent. Took until level 20 to get difficult; would recommend separating levels by difficulty.