Let me tell you, I like going fast in games but this one is just a little too quick for me. It's easy to run into an off-screen ghost while moving away from another one. Aside from the speed the controls work well. There's one spot where the floor juts up at the intersection of two rectangles and stops forward movement, other than that the level seemed well put together to me.
I didn't use the dimension shift after initially entering the ghost world, since that version is interconnected and led to the end as I expected. An idea for switching back and forth that way usually has each zone bridging to the other so that you cross gaps on one side by being in the other, whereas here the non-ghost zone seems only to give the player breathing room since it doesn't contain enemies.
The art is simple but I like it! I see in the screenshots that there are a lot of unused assets and also mechanics. It's important to rein in the scope of a game when you're on a very limited timer so good job on scaling it back and getting something submitted! Keep in mind you can always add more to your game later, once this voting period ends. :)