Yay ! Thank you so much IsaLand, I'm really happy you enjoyed and understood so well the intent of this game ! The thoughts one is considered the first ending, so you found all of them, congrats !
Yeah I'll definitely have to change the "Respect" sound effect, you're not the first one to give that feedback. With lack of time I sampled it from a famous movie so I modified it (too much) to hide that I did, to avoid potential issues. And I thought that the meme "Press F to pay respects" being a popular reference could have the player expecting that word and make it understandable even though heavily modified :)
The F key is actually never locked, you can use it from the start haha. It's intentional yeah, I thought it could make players laugh to realize they could do that all along !
Thanks a lot for the feedback ! :D