GOOD
but that's all it is... is just good. Few more power ups, maybe another enemy. and I suggest that, to just make it longer. More health, longer signs of when the boss attacks, and to not have everything 1 (or two) hit kill.
Ah good game, the artwork is great, and the gameplay handles fine. But just so much room that coulda made it awesome is all l3; Nice piece :3 *votes five*