This game is "An Old Space fighter game with retro pixel design and modern gameplay" (there are even 2 game mode!).
Game play: Fight enemies, avoid asteroids and you will be fine. Tap on screen to move your ship (it will fly & fire at touched point)
In the hard mode (Flame icon), only main engine works, so good luck with Zero Gravity environment.
Credit: Special thanks: wuhu and other artists @opengameart.org for their great free assets :)