https://opengameart.org/content/space-shooter-redux
https://opengameart.org/content/2d-nature-platformer-tileset-16x16
https://opengameart.org/content/retro-game-sound-effects
https://github.com/digitsensitive/phaser3-typescript
https://github.com/WesleyEdwards/galaga
https://juhosprite.itch.io/simple-platformer-16