Neat little game. A couple of oddities though.
The name is a bit odd. I get that you have to beat each level before the dark shadow thing gets you, but really it's not about speedrunning, should've probably added a timer and some incentive to master and beat each stage as fast a possible instead of just faster than the shadow can get you.
The music is nice, but since each level is pretty challenging I got pretty familiar with the first 2 seconds of the song. Maybe you should not have made the song restart when you restart the level also, so that I could've heard more of the song.
Last and probably least important is that I couldn't use the D-pad to move, only analog stick, which a lot of people don't like for 2D platformers with digital movement.
Other than that it's a cute little game that I enjoyed, the graphics were perfectly nice. Would've liked to see a bit more variation in the gameplay as well, but I guess you were probably strapped for time like the rest of us :)