Lizard City-- Looking for Feedback! Thread

Hi all,

I'm developing a game I call Lizard City. It's about a lizard exploring the tunnels of an underground city to get to the bottom to turn on the lights. The game will be 2D, navigation will be top-down (the same kind of perspective as like Pokemon games). I have no final 'game' artwork yet, but I have been building the style and color pallet. I'm just looking for you first impressions of the tone I've developed for the game so far. Which lizard designs work? Which ones fall short? What's appealing? What's not?

Lizardcitygame.weebly.com

^
That's the link to the gallery I've been posting most of the work.

Thanks!

Everything looks good, art - main theme, I believe youre focusing on kids with it?