From gameplay perspective its a 2d side scroller. You can jump, run, shot and beat enemies to death using rusty water pipe. Additionally you have molotov coctails and glowsticks, but they are very situational and, mostly, useless.
Also you have several clothes pieces which works as armor. Each enemy attack tear down one clothe piece. And you also can strip down one piece to replenish some health (around 1/10 or 1/7 of max health).
Mostly you just walk from left to right and shoot everything. Sometimes you are stumble upon closed door and need to backtrack a little to find key.
That all about gameplay. So dont expect from it some depth, game have slightly different aim.
There is even some kind of plot. In short, humanity are down by some "non generic zombie virus". Main difference from "generic zombie virus" is that it have some relation to plants, so infected humans have some quirks of/looks like plants.
Heroine is a very bad thing, my brother died because of this shit, dont do drugs kids are hid for 3 months in some building after have world collapsed. Now shes out of supplies and need to find new shelter because spring is coming, whatever that mean.
And thats it.
Graphics are simple but good. By simple I mean its have only minimum amount of details on objects to figure out what it is, and to not looks cartoonish.
Amount of details on levels is big, here and there lie some boulders, trash, corpses, etc. So there are no impression that you wander around bland similar looking corridors.
Sex sprites are good but...to simple for my taste. But there are lot of different scenes, starting from vanilla rape and ending on some mind control stuff. Also here and there on the levels are placed non interactive sprites of womans copulated with plant-like monsters.
So it simple in concept game, nothing too special. It still worth playing.
If it would have something like fencing on two meter long dicks, sniping fire with milk from gigantic boob, battle of the giant cum monster against giant condom monster, a LOT of michael bay explosions, something memorable and special aka WOOOOOOOOOOW moments, the game would be much better.
I mean, the only memorable thing from the entire game is a boss fight in storage room flooded with milky looking liquid, probably cum. Other parts of a game are easily forgettable. Which is a shame, it have some potential.