It looks to me like Yotam here is intentionally trying to go for a minimalist sort of style in his art, the best word I could use for it is... Kindergarteny. It reminds me of something a really talented five year old would draw. That's by no means an insult. I always love looking at that kind of stuff, it's so funny, cute and just puts a smile on my face. I hope you understand what I mean.
I'm guessing the art kind of has a Chris Ware... well, probably more like David Heatley, intent to it, (Now I'm breaking out the indie comics references... This site really does bring out the art haus snob in me
) as in trying to convey an idea with simple iconographic sort of images that are not muddled by being detailed. Of course, I could be looking into this whole thing too much, which I tend to do. You probably just wanted to make your game look like silly, bouncy fun... for the whole family. And no, there's nothing wrong with creating a product that can be enjoyed by literally everyone.
To make this whole diatribe relate to adventure games, the art reminds me of the weird classics Captain Mostly Drinks Bleach (Oh dear god, that was one of the most insane games I've ever played. I was in a feverish delerium by the time I finished, sweat beading on my brow, ready to do something like eat my carpet. It needs to be on this site. I'll write a review.) or Reality On the Norm: Nihilism.
I'm going to download it now, but I'll play it tomorrow. I'm just too exhausted to appreciate it at the moment. Then I'll come back with my comments.