Fixes #99 I think... needs testing

This is the line that generates a console error every time space is pressed.
![console](https://cloud.githubusercontent.com/assets/6556051/3110764/1a8a0df6-e6a9-11e3-8104-822d55a2ac97.png)

Commenting it out makes it work for me. Having said that, I don't have any sounds anyway - so you should probably test that just removing it makes sense...