I loved the transition from level to level. The pixelated design was amazing! I really liked it! However, the key following you was a bit slow and I got to very amusing positions where I would finish the level at the portal and the key would be on the other side of the screen(The last level). Nice effects for the background and the cat jumping. Overall 9/10. Some electro music in the background would have been nice but hey! You did a great job!