I love the graphics! Super clean recreation of the classic gameboy style, though it is hard to see where the enemy bullets are and the screen is way too small.
It's a pretty good recreation of Space Invaders, but that's pretty much all it is. There's a bit of a fun twist in that dead enemies act as projectiles as well, but otherwise it's just standard Space Invaders, with no powerups or new enemy types and so on.
Overall still good, but it's not really the most original.