Great tagline and premise. I enjoyed the audio and visual experience of running into walls. I wanted a way to open my eyes without moving. That  L-shaped level was a good way to teach the mechanic.

Good entry overall!

Although it wasn't immediately obvious what exactly was happening when I hit spacebar (that is, you become invisible, but not untouchable, and it passes a turn), I rather enjoyed the challenge once I got the hang of it. I could ponder why the cat doesn't just eat the mice instead of stealing their cheese, but why ruin a good thing?

Well done, and Good luck! :D