SigNul

The world is under attack and only you can save it!

Take control of the world's most powerful musical weapon - the SigNul and stave off the attackers for as long as you can!

(This game was made in a couple of hours, you're going to have to work with me on this one...)

• [Up]/[Down] - To change alter the signal and change the tune
• [X]/[Z] - Start the game, or restart after gameover
• Each note in the signal tune causes the corresponding turret to shoot
• Score (shown on the top left) by shooting down the alien attackers!
• If an alien attacker makes it to a turret you lose a life (shown on the top right)
• The more you score, the faster the game gets!
• The game is over when you've lost all your lives
• Share your highest score in the comments!