this game is not as bad as some peeps said before.
Its actualy a great game and the topic shoot em up has been put into practice very well.
However, minor flaws are the fact that you have to grind to get nice equipment (grinding...shmup... the heck?). I think grinding does not belong to these games.
also, some enemy positions are just unfair and frustrating. For example, these guys dashing from the bottom of the screen rith onward to you is just evil.
well, at least you dont die by the first hit. this would have been even worse :P
about the hitpoints-thingy. its a good idea you brought in there and it remembers me a liddle to the game RefleX (which every shmup-fan should have played at least once). However, the hitbox is big. very big. kinda too big for my taste. in other shmups, the hitbox is rather small (not to mention touhou with a 4x4 pixel hitbox :P).the hitbox here is so large its hard to dodge stuff.
By the way, ususaly, the bullets are poping out of the enemy mass so that you can see and dodge them properly. In the onslaught in the game, its hard to see the tiny bullets and so its as hard to dodge them.
So, I give you 5/5 points, but only 8/10 in a review because of the flaws. Still, its a very good shoot em up where the creative ideas of great desighn and a upgrade shop definetly overshade the flaws.