First off, whoever said this game's just bad or doesn't play like a shooter... didn't play much, it's obvious they probably got stuck with the "place timed bomb" power and never moved forward...
This game feels pretty unique as a shooter, it's not actually a shooter in a strict sense, but it feels like one, let me explain:
You maneuver a creature that's made of 3 parts, a head, a body and the fins, each part has a specific power or bonus that changes the way you can approach enemies, however the point of the game is to distort the "net" of the arena so that the enemies get stretched into it and eventually explode, at the end of each stage there's a unique boss.
There are parts that make you place timed bombs (I'm lookin at you, bad reviewers >.>) which can be used to wipe clusters after significant stretches to the net (meaning the fins do the big job, in this setup), some that make you greatly distort the net in front of your head (which results in a very precise snipe, or shot if you like that stuff...), some wings actually distort the net to form wave-like motions which, if moving fast enough (and accurately as well) can wipe whole clusters of enemies, some others suck-in enemies while running away from them (circle works too, actually better),
there are also bodies that empower health and movement.
Now, combine said parts to make your own playstyle (either fit the one needed for the stage) and consider this, while "swimming" you cause waves through the net... let's pick the snipe-head mentioned previously, if aimed correcly gathering enough speed, swimming towards enemies empowers the "shot", because you are moving the waves towards them.
The monsters in these arenas usually come in clusters, actually it's a single sentient being that comes with meat parts (non-moving, non-attacking), shaped parts (those shoot or attack in some motion), and purple parts (which function as the creature's brain, dispose of those and it won't move any longer).
It's also worth mentioning that whenever you manipulate the net these monsters react differently, some may come closer to you from behind, some try to dodge predicting your route, things can get hairy quickly if you don't pay much attention to how you manipulate the net because it's made by squares and less squares to travel (stretched wide net) means faster movement (ie: movement=5 squares per second).
It could take a while to adjust to this game as it's rather original (which I appreciated, very), but it's rather good, especially if you are bored of the usual projectile-hell shmups (either you don't appreciate that design).
On a note, the game requires some grind to gather points to buy the different parts (so spend'em WISELY), you might want to check other players' videos to see which parts they are using and what they do, because every body part does different things (and some parts are very expensive).
The game doesn't seem to have a proper tutorial (considering the "net" mechanic), and I forgot to mention that... If an enemy gets too close or shoots, it hurts you...
ABOUT THOSE COMPLAINING MONSTERS DON'T DIE
They die from a single snipe with one of the head parts... a suck-in from some fins... waves correctly placed... basically anything done CORRECTLY works, really, yea, just one shot, now go and stretch that net.