1GAM November 2015: Little Tennis

Aaahhh… each month the difficult decision on what game idea to realize. Hmm, should I try something classical, e. g. a simple jump’n’run or tower defense thingy, just to have made one and gain technical insight? Or should I dabble at a fresh idea of which I do not have a clue if it works out, if it will make any fun, or I even can finish it given my time  constraints?