Awesome pocket-sized shmup !
The art is really beautiful and i like the enemy designs especially the 3 headed owls XD
The music is quite awesome and groovy as well, it really fits the overall mood of the game to a T
Gameplay wise the stress mechanic is well made and i like how in a way it feels like a dynamic difficulty system that rewards careful players who try not to take too much damage :)
Overall solid entry, well done ^^