Shows potential
Nice photo realistic look. Some suggestions for gameplay improvement:
1. Harsher limits on the number of units under your protection you can have destroyed. As you yourself are not very vulnerable, this is the game's main challenge. Let the playr know that he cannot have more than, say, 2 or 3 units destroyed by the enemy if he wants to finish the mission successfuly, and keep track of the number during the mission.
2. The special moves (roll, loop) are too powerful. Make them disadvantaged in some way (for example, can't shoot or turn while rolling) and/or limit their usage (for example, by having your plane lose altitude when used, taking some time to regain it).
3. Bombing will be more interesting if the bombs are launched realistically in an arc, having initially gained the horizontal velocity of the airplane.