There are many problems in your game :
- It's very unrealistic. Could you imagine someone who finds his parents dead and says only a "mother" or "dad" then adds "what's that on the wall" ? OK, games aren't supposed to be always realistic but, in this case, it made me roll the eyes.
- Once I left the room with with the mother, I was unable to enter it back.
- I didn't find the key to open the locked door. Perhaps I could have but I was tired of finding myself again and again in the room with the father.
It's your first game, it's perfectly normal that you need to improve your skills.