Oh, crap.
Both endings are tragic.
Not a bad little game. I agree that the "dash" controls is a little too sensitive, but if what you say below is true, you intended for people to take their time on this, and stopping to make sure the right keys are hit at the right time seems to solve to problem of dashing over the edge.
Music is very good.
I notice a weird glitch. Really tough to explain, but I'll try. On the level that says "Imagine what could have been" (level 7, I think) the opposite control problem happens. Every time I played, I went all the way over to the right side of the screen, and when I made my big jump over to the middle platform (it has a few rabbits and thorns), I was unable to perform a dash unless I took my finger OFF the arrow key. At the one spot, the Space Bar won't work with the arrow keys... only if I'm going left. In short, it made the level impossible to beat unless you realize that you have to move your hand off the left arrow before you make the mid-jump dash. I'm not sure if it has happened to anyone else.
Interesting little game. It's actually pretty easy except to the glitch. I think people are just approaching it wrong. I like it.