Nice entry.
It is a shame that you did not make a few more levels. I must admit I was stuck for quite a while in the last level not realizing how changing between characters would allow me to put the white character on the top platform. Once I figured that out the level was easy to complete, but it feels like a similar, yet simpler puzzle should have prepared me for that situation.
Clean controls, good sound effects, even though you were missing a background song and on theme. Good job