Hi! Thank you so much for playing the game, I'm so happy you liked it (even though it was confusing XD)
To shed a little light, here are some--spoilers!
**YES, A LOT OF SPOILERS! BEWARE!**
Ok, about the Rudy matter and the double "nature" of the creature: I wanted the player to craft the story and the characters, so based on your behaviour towards the unknown creature (you can either be kind or a jerk to him, but also be "brave" or "scared") the game decides if YOU are the human or the monster of the story. Basically there are 4 combinations:
1)You are the human, the "kid" is a monster
2)You are the monster, the kid is human
3)You are both humans
4)You are both monsters
For the gallery image: I'm not sure if I understood the picture you are talking about, but I think it might be either the one for ending 3 (walkthrough, in the download section) or this one, try to pick:
Hi -- I'm...no one -- where am I? -- go with him -- eat -- don't say anything -- eat it raw -- be aggressive -- be evasive -- start a fire -- have you seen yourself -- sleep -- i need to find him -- don't -- yes -- stay with him
Let me know if this is it, if not I'm at your disposal 👍 and thank you again for leaving your feedback, I really appreciated it :)