That's Nuts! v1.5.1

A small update including fixes for two bugs that were found after the initial launch, as well as some content that didn't quite make it into the first builds.

• Added a Hawk critter that spawns on the left side of the screen and flies horizontally at a fixed height. The Hawk only appears after a score of 300 is reached
• Fixed an issue with critters spawned during the tutorial briefly flickering
• Fixed an issue with the Sharpshooter and Anti-Air achievements not being counted properly