Hands down a pretty decent 2D shooter. It has a retro feel, with some pretty retro gameplay, but man does it look modern! Long story short, it's a retro game with pretty updated graphics.
It's pretty simple, players have a plane, they launch, shoot down enemies, gain upgrades, and use upgrades. A few games in and so far no problems at all, and I had fun, which is most important. As for upgrades, there are a ton of them, and the variety has been great so far. This makes progressing the game even more rewarding.
But at the end of the day, the gameplay is nothing really special, as there are a lot of other games with similar style as this already. However, what this game has that makes it stands out is the graphics, which is the definite winner in this case. Overall, I loved it, so 4 stars!