Excellent Sprite Shooter!
like it's already been stated by the many others before, the graphics are awesome- the upgrades are helpful (a few seemed slightly pointless) and the gameplay was simple but difficult- so it was most assuredly a good game!
The only problems i could see with it is that all the enemy "shots- or whatever- they all looked the same, but all delivered different amounts of damage- Which led to the health bar being deceptive as to how much health you really have and how much damage you can take.
the only change i can think of s different enemy projectiles so we know "oh the blue shot only hurts us by 5 but the giant magma ball of doom does 15" ya know? but all-in-all, an Excellent game and worth a play or two.