Status: Changed to say "NeoLemmix - Single Level". Changing to the level's title would require significant changes to how single level mode is implemented (or alternatively, not immediately applying the change).
When you play a single level, what you see on the taskbar is "Untitled Level Pack" (as seen in the picture for the taskbar below).
However, you are only playing one level, so it should read instead as something like "Single Level". Maybe even the title of the level, if possible?
This is only a minor suggestion, though, and it's no problem if this one is a low priority.
I would consider this relatively unimportant, but it's also very easy to implement. So I will most likely implement this suggestion in the next update.