Don't be fooled by the rather nice looking art. There's nothing worth of your time here. Go play any other Jungle Girl/Demon Girl clone instead.
What this game has is maybe 5 different sex scenes, but it's one of those stupid "lose4sex" WITHOUT A GALLERY, so you're always restarting from the beginning and a different sex animation only shows up around the 3 minute mark, which is how long you'll take to reach the 2nd flag
You see, the "movement" is automatic and takes roughly 80 seconds between flags. Each flag adds a new enemy type, which may or may not have a different sex animation. 8 flags * 80 seconds = 640, so you'll waste, at the very least on a perfect run, over 10 minutes