Ok, let's get the facts that I love the music, characters, and story out of the way.

My FAVORITE part of the game is how it breaks the 4th freakin wall.

Specifically how resets are literally part of the game.

Like when you accidentally kill Toriel on your first blind playthrough, feel guilty, and reset.

Then Flowey's like HA. u thought u could take it ALLLLLLLLLLLLL back. WELL UR WRONG, MR

Ok, thank you for dealing with my top notch spelling and grammar.   .u.