This is a really bad take-home exercise, because it is way too vague. This vagueness makes it very hard for me to decide how much time to devote to it, and what task is complex enough so that you will consider it, but not too small so that you don't throw it away. Instead of giving me a bar to jump over, you make the bar invisible, then expect me to jump just above it. So I hope you do have a default project for those who are not "creative"... at least not for the purposes of a job interview...
