A very intriguing game. I love the visuals as well. Reminds me of Little Nemo on the NES. But I couldn't get the level to change after clearing level 1, and pressing esc didn't take me back to the menu. I could be doing something wrong.
The bat feels a bit too restrictive, especially since it's the first creature you actually control. once you've gone down, there is no way to get back to a height where you can clear the obstacles and reach the next creature. A very promising game, all things said.