When I run a test with one of the sample tanks (e.g. seek and destroy) it's not able to find some of the constants & self-destructs: <img src="https://cloud.githubusercontent.com/assets/3172103/9266098/78609a54-420a-11e5-8b4c-39dc5409a038.png" width="800px"> Not sure if this is an issue or I'm missing a step.