Overview:

Millil Mission! is a simple side-scrolling action game.
There are 13 stages in total, and you must overcome the enemies and gimmicks in the stages to reach the goal.
You can attack enemies using 8 types of attacks.
If you are grabbed by an enemy, an H animation will start.
If the player makes a mistake during a boss battle, an animation will start.

— About H with enemies—
It is basically interspecies sex, and there is H with tentacles and machines.