check out the original darkened cave and you will know how to play I google translated everything. the text, the sprites, and the animations. I couldn't change the levels but that should be ok.
you wake up inside a cave and want to go home. the cave is close to your house. but in the night something's not right. everything is google translated. wait I mean I want to leave this cave, there is another cave near my house. But something happened that night. google everything