Too easy
Music 8/10
Artwork 6/10
Gameplay:
Upgrade system 5/10 ( too cheap, not much to choose from, can't upgrade shield/dmg)
Control system 8/10 ( easy to master, no tutorial)
Storyline/Final goal 3/10 ( no story, no highscore top board)
Bosses 0/10 (no means no)
-------------------------------------
-------------------------------------
---------------------------
My conclusion - no more than 5/10
P.S.Got bored on 2164431 so may be have't seen even a half of the game... if this is so... Where the heck is saving option?!