Invasion! is an original arcade-style game in which the player controls a flying-saucer from outer space. The player's mission is to collect objects from Earth, while of course avoiding the constant attacks from frightened Earthlings.
- JavaScript
- HTML 5 Canvas
- Players control the flying-saucer using the four arrow keys
- Holding the shift key activates hyperdrive, doubling the speed of the flying-saucer
- The tractor beam is activated by holding the spacebar
- Shields, when available, are activated by pressing the 'x' key and protect against a single missile strike for up to 8 seconds
- Collecting an object earns the player one point
- Collecting a crate also earns the player one shield
- Crates appear every time the player earns 10 points
- Any object that is dropped and caught before reaching the ground will earn the player two points
- Missile velocity increases every time the player earns 15 points
- Players rapidly lose health while in contact with the ground
- Capable of changing behavior depending on gameplay
- Allows the player to interact with objects in complex ways, such as throwing and catching
- Accomplished by utilizing Google Firebase (Cloud Firestore)
- Additional enemies to avoid, such as side-spawning fighter jets
- Additional "tricks" implemented for retrieving objects, such as catching an object from below it or "looping and catching"
- Multi-player functionality