SigNul by tomputergames is a game made for PICO-8.
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. To play the game smoothly, you can remember the following controls:
- [Up]/[Down] – To change the signal and change the tune.
- [X]/[Z] – Start the game, or restart after the game is over.
- Each note in the signal tune causes the corresponding turret to shoot.
- Score by shooting down the alien attackers.
- If an alien attacker makes it to a turret, you lose a life.
- The more you score, the faster the game gets.
- The game is over when you’ve lost all your lives.