If you start the game, go to the forth level first and press escape, it will lock the player of doing anything, you will get stuck and will have to alt + f4.
The wall jump and slading mechanic is very fun, the art is very cute and the music was nice, maybe more sound effects and particles would be good. The game was short and i didn't feel too lonely, it does have a good dark atmosphere but for me, loneliness is not just being alone but wanting someone to understand you, you can be around a lot of people or friends and still feel lonely, maybe because i didn't know who the main character was and where he was i couldn't relate as much.