WOW, I actually just realized this right now, my mind is completely blown! My mouse was resting far to the left, so my swimmer got stuck on the left wall. I honestly thought the gameplay was just about hitting the arrows correctly! Since I wasn't getting killed by the zombie hands or the falling enemies, I assumed I was playing perfectly and I didn't even pay attention to the right side, lol. Silly me! I'm going to give it another go and play it properly this time!