Got it for 1 dollar. It was well worth that. It is good gameplay wise, but bad resource wise. They designed this to run out of bullets. For 10 dollars... mmmm, I would have refunded it.
Dev: "You want play gam? You get no bullet."
You need 3 different color Bio Masses to make bullets, and the yellow one hardly ever spawns.

When you increase in level, you can upgrade your gun! Yea!
Me: "Let's see, the bugs were 13 HP, and it took me 4 bullets to down one, now it should take 3."
Dev: "You increase level? I increase level of HP for'd bug. Double." A bit of hyperbole on my part.
So, in the end, you are frantically just trying to keep up with the enemy level increase.

And the girl takes a long time getting in and out of the "Steel Soldier", your mech.
I really like some of what they did, but dislike the sparsity of the necessary resources. which drags the game to a halt. I am running around looking for yellow crystals, with a horde of bullet sponge creatures on my tail.
Also, a bit buggy technically. Went to input my name, and the interface disappeared, and I needed to ALT+TAB out to close the game.
It has potential, but for me, the lack of crystals is making me shelf it, and hope the Devs make a few positive changes to the resources. :)