This is a good casual game. It seems well suited for mobile devices and HTML5. The objective is easy to grasp and the controls are simple. I like having the option of arrows or A/D to control the character. The other options like full screen or windowed, music/sound off/on are nice too. It all seems very polished.
I played the Windows PC version for a while. The first thing that struck me was the music. I like that rhythmic tune. You used that in another game, as I recall (I think...). It's nice. And the graphics are very slick looking too. The character and playing field look nice and crisp in both full-screen and windowed mode. So I'm assuming you're using vector graphics.
The gameplay is OK. Challenging and fun for a while. I wasn't able to score higher than 32 before the level ended. And it seemed like I was repeating the same level over and over. Guess that's why I never saw any of the screens you show in your screenshots. Perhaps I need to score higher to get those. Or maybe they come later in the level?
You might consider having different levels-of-difficulty: easy - regular - hard, etc. It should be easy to just change the character's forward speed from slow to fast, depending on the player's choice. And maybe change background image/color for different levels, and maybe the sprite for the dots too. As a way to add some variety, so the gameplay doesn't get old.
But it's a pretty fun casual game. And it looks and sounds nice.