Thank you so much for playing! The (legally distinct) pacman-like enemy is very much too fast, but there's a trick to dealing with it. A trick that isn't explained anywhere and isn't at all intuitive... It follows the exact path that the player takes, so you can lead it to out of the way places early on before creating a safe path for the Pemmings. This helps give you some breathing room since it's impossible to outrun when it's directly on your tail.