Nice submission! The cat bits had me laughing out loud!
My biggest challenge was in distinguishing the front/back sounds in the second level, and the solution here could be as simple as filtering the behind sound a lot more. I also may have encountered a bug, where I technically won the last level, but within the last ten seconds, so there was overlapping dialog that seemed I got both endings at the same time?
Those two issues aside, this is a great product for just four days of work. There are some excellent suggestions here that could guide you over the finish line for that last level that you had originally planned.