The other day I could a project inquiry. The current deck looked like an infographic, it was very nicely done: soft pastel colors, retro fonts, nice icons. Still, the company had difficulty finding traction with investors: where is the meat, where are the numbers, this looks like an ad.
Many VCs come out of the world of engineering or banking which has a certain quantitative, macho communication style to it. Even if your product positioning is “cute”, your investor presentation should probably a bit more testosteron-loaded.
In my previous life as a management consultant, I have spent many years inside consumer goods companies. Believe me, their management presentations do not look like the ads they put on TV for their products.
I am not saying that you should kill the cute slide deck (the world would be a lot more boring if that happened on a large scale), I just wanted to emphasize that if you decide to go with this style to be aware of your audience and compensate in some other way.