Okie dokie, so I'm being an idiot and can't remember the name of this web comic that looks visually amazing and I was stupid enough not to bookmark it.
1. It had an amazing, vibrant and colourful 2D art style. The proportions of the characters are exaggerated slightly to suit.
2. The story premise is that it's the summer Holidays for the child protagonist and he's spending the summer at his Grandmother's ranch. His father is pushing him to pick up his grades but he'd much prefer to go on adventures in the nearby forest. He retreats to his room later and finds that there is a world hidden (in similar fashion to the Wardrobe in Narnia) behind a crawlspace in the attic.
3. It's only up to it's second chapter or third chapter at most at this point.
4. Each chapter is on a single page and you continually scroll down and the way they integrate the compositions on some of the different panels is amazing.
That should be enough information to go on Thanks.