Invaders

An inversion of classic vertical shoot-em-up arcade games. Play as the invaders trying to break through the defensive line. Endure the hail of bullets and breach the line to proceed to the next stage. As stages progress you gain access to special ships which allow you to return fire as more challenging turrets appear to defend the line from your invaders.

Controls:

[Move Left / Right]    A and D or Left and Right arrow keys

[Pause / Unpause]    Spacebar

Special Ship Firing Commands:

• Purple:    1 or J
• Orange:    2 or K
• Gold:    3 or L

Scoring (Based on how close to the line your ships get):

Green - 50pts per unit travelled. 1000pts if it reaches the line.

Purple - 100pts per unit travelled. 2000pts if it reaches the line.

Red - 150pts per unit travelled. 3000pts if it reaches the line.

Gold - 300pts per unit travelled. 6000pts if it reaches the line.

Dev Highscore: 422,579

Art/Audio Credits:

Backround:  Parallax Space Scene (seamlessly scrolls too) by LuminousDragonGames (https://opengameart.org/content/parallax-space-scene-seamlessly-scrolls-too)

UI:

• Sci-fi UI panel by bart (https://opengameart.org/content/sci-fi-ui-panel)
• glow circle by oglsdl (https://opengameart.org/content/glow-circle)
• Neon Sticks by ki2kid (https://opengameart.org/content/neon-sticks)

Invader Ships:  Space ship building bits, volume 1 by Stephen Challener (Redshrike) (https://opengameart.org/content/space-ship-building-bits-volume-1)

Turrets:  2D Spaceship sprites with engines by morgan3d (https://opengameart.org/content/2d-spaceship-sprites-with-engines)

Bullets:   explosions by chabull (https://opengameart.org/content/explosions-0)

SoundEffects:

•  Sci-Fi Sound Effects Library by Little Robot Sound Factory (https://opengameart.org/content/sci-fi-sound-effects-library)
•  Sci-fi Sounds on Kenney (https://www.kenney.nl/assets/sci-fi-sounds)

Music:  "Automation" by Eric Matyas soundimage.org (https://opengameart.org/content/automation-looping)