Fairly decent game. I like the graphics design in terms of technical skill, although the overall artistic style of the game could have been a little better. Also, as others have pointed out, the game lags when using mouse control. I did end up completing the game. The final level is a bit hard, so I had to farm up some extra lives in order to beat it.
The problems with the game design are as follows:
1. In general, I dislike shooter games with a large ship hitbox. This game isn't the worse in this, but the hitbox should be smaller. Preferably, the hitbox should be smaller than the actual graphic of the ship, so it makes dodging more epic. The NG game Bullet Heaven is a good example. When the hitbox is big, everything is extraordinary clumsy, and it feels like you're a fatass that can't get out of the way.
2. This game is mostly about luck rather than skill. The powerups are way too powerful, and if you keep on getting lots of shield and extra lives, it's very easy to beat anything.
3. The game could use more storyline to immerse the player into what is going on.