Space Invaders - Game Challenge Project

Game I made from the game 20 game challenge project, I have already made Flappy Bird,  Pong, Breakout, Yandere Joyride (Jetpack joyride clone), and now this.

Update: I realized after playing this game has too much bugs like the sounds still play after game over, explosion happens after restarting the game, my health doesn't get reset when I restart after something happens. TOO MANY. And I'm never fixing those, mwahaha.