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Balance sound levels, fix doubled 'alive' sound
Add keyboard shortcuts for pause and mute
Add simple levels which slowly increase difficulty
Merge pull request #50 from ethanbustad/simple-levels

Add simple levels which slowly increase difficulty
Merge pull request #51 from ethanbustad/sound-levels

Balance sound levels, fix doubled 'alive' sound
Merge pull request #52 from ethanbustad/keyboard-shortcuts

Add keyboard shortcuts for pause and mute