I really like the concept and it has a lot of potential but unfortunately I wasn't able to pass many levels as the mechanic wasn't explained too well in game so I had to read the description. Also I kept dying because I was pressing the up arrow key instead of the space bar because I that that was an alternative... Also the level with the spikes in between the blocks (like one of the first) I found very difficult because he was falling very slowly so I couldn't make it to the portal in time and also i would be like a pixel off and die from the spike... :| Although that may just be my platforming skills :P Anyways other than that I really like the concept, the art, and the sounds. Good job! :D
Also thank you for playing my game and posting on my topic :)