The little guy is super edgy and it's cute! I love how the cape moved. The portals are an interesting concept, but I feel the playground doesn't best show it off, since the only thing that changes when you go through is the floor color. I literally had no idea it was a portal till I read your message below the game.
I'd consider putting an in game HUD explaining the movements and such, and updating the background to show other objects, maybe that way the player can get an idea of the actual movement through the portals. But it was a very interesting and unique skill!