Wayyyyy better
A detail that comes to my mind : are the side of the rock block actually blocking? You have put some platform that continue through rock. If the sides of the block are indeed blocking, the player can't go there. I have a simple rule, if you can see ground, you can walk on it. If you want to allow the player to go through the block, make a variant with very dark sides. Visually, it will be easily understandable.
As for the background, the silhouette of a forest maybe? Or a gradient for the sky, would look less flat. Or both?