For the purpose of leaving actionable feedback I wanna say a few things. The number pad at the start being linked to a seed and having an infinite loop unless an ending seed is put in, is actually very cool. However this needs be communicated to the player better because it wasn't till I read your comments that I realised this is what was going on. Making the keys more challenging to find and some other simple puzzle mechanics could also help beef up the actual gameplay.
Oh and maybe have hints to ending seeds in the non ending loops to aid that feeling of progress.
I didn't notice any sound either (unless I forgot to turn it up) but this could enhance the mood aswell.
I hope you continue making games, and continue with your story telling. I was actually kinda satisfied when I found the ending with my mother and that ending did fit the theme with the character becoming self aware that hey are in a video game and their world isn't real.