Fun vs innovation

I'm starting now and I might have an idea. It's not too innovative, it's basically a one-screen platformer game involving strings and climbing, possibly similar to what other people are making, but it seems to have some potential for fun. Previous pyweeks I always tried to focus on innovation before I started the game, now I'll try something different: start the game first with a solid base, and then think of neat (possibly innovative) features I can put in it. I already have one pretty neat feature I like about this idea, but since I'm not too sure about it, I'll tell it later. :)

What I really mean is, this time I'll be focusing on the "fun" aspect, instead of the last times when I mostly tried to be innovative. I hope it works.