I got a chance to play your game and it looks like a homage of the 1980s arcade games. Mostly it looks like a combination of the game Defender meets Space Invader. However, there are a few suggestions that I spot that could be a problem. First keep the background still because the spinning lights can be either distraction or straining on the eyes. Maybe replace it with non-moving twinkle stars in the background with a streaking shooting star that appear randomly, but rare in the background. Next include a timer to create goal and stakes to the game play. Finally, include a weapon upgrade like twin laser. I hope that these suggestions would help improve your game.