Frustrating as hell at times.
The game is great, don't get me wrong. The graphic quality is superb, the gameplay is fun, the concept is top notch.. but I have a pretty hefty list of complaints, but with solutions to help them.
1. The controls are absolutely sluggish. It takes far too long to maneuver up and down, and it causes you to have to move to avoid obstacles before they're even on screen, and it makes hitting any enemies an absolute hassle.
2. The lack of control over the graphical quality. My computer operates best if I bring it to med or low quality. This game lacks that option.
3. The lack of ability to revisit tutorials. I had a hard time landing. I would have been able to fix that issue if I had been able to revisit the tutorial.
4. There's a design flaw on level 4. After you come out of the first hangar, the second one is too close, and no matter if I slow down before I hit it, hold up as the level starts, or both, I always hit it. I suggest moving the hangars just a little farther apart.
5. When you respawn, how it nosedives from the top of the screen instead of coming in from the left. That resulted in more game overs than anything else.
6. The defense upgrade did absolutely nothing for me. I died just as easily from bullets and crashing my plane, if not even easier. Make it more noticeable, instead of making it defend against one extra bullet.
7. Wingman is completely useless, also. Replace him with the option to buy more effective controls. That would fix this problem, as well as the first problem I stated.