Version: [Final] (My own fixed MTL)
Even after fixing problems caused by bad MTL (I uploaded somehow fixed MTL in this thread, so I am not going to rate the translation) and managing to play to the end, this game is not very good.
Whole game boils down to entering the level, running away from enemies surrounding you (you appear in middle of enemies) while your invincibility lasts and then holding A to shoot all enemies as they try to approach you and slowly moving through the level trying to find the exit.
Enemies are no problem once you get away from the "ambush" at the beginning of level. All enemies can attack you only by touching you and do not use any strategy against you, so killing them is easy.
There are traps in normal levels that are barely visible (mines) so under some conditions they are virtually invisible, what is very annoying. You cannot dodge the effect after stepping on them so it feels unfair, but if you can see them, they are extremely easy to avoid.
Gameplay is extremely repetitive and fun only for a short while. All normal levels are basically the same thing.
What I found really discouraging is that you get good items (triple shot, damage increase item...) for being stupid and getting defeated. Great example is one special room: Sign says that there is a treasure switch. I step on the switch. Enemies appear all around me. I slaughter them all without taking any damage. I get nothing. I load the game, step on the switch and allow myself to get raped by the enemies. Triple shot ring appears on the ground next to me after finishing the rape scene. Getting sex scenes on defeat makes sense. Getting good items only on defeat makes no sense at all.
All endings are extremely disappointing and feel like your effort was wasted.
Animations are good and they have toggleable cross-section display what is nice. What is a waste is that there are only vaginal animations, although there is also oral and anal in CGs. There are animations for each of the 4 enemies with some variations.
CGs are okay. Nothing special.
Unless you want to see the animations, do not bother with this game. Gameplay is bad and CGs are not worth it.