As an side scrolling dodge game - I liked it a lot. Very simple and to the point with good controls. The platforming was okay - I thought the controls during it were sluggish and not as crisp as the side-scrolling part.
The boss fight was a bit glitchy, there were a few times when he would go down that he didn't actually go all the way down.
It was straining watching the icons go from right to left because of the under the icon. You can probably drop the text since you've got green is good and red is bad.