Urm....Let stop you right there
IGN and other sources rated this game a hit for many reasons that a lot of people,not including myself, agree with
It has excellent graphics,I mean,it rocks the 16-bit and 32-bit EarthBound style
The music is really good, and this is the only thing I personally like about Undertale,but that's just me..
It has a new mechanic in which you can spare and not kill like in most RPGS, which, in turn, sounds bad on paper,but with the execution,people loved it.
It has a variety of wonderful characters, each with their own personalities, making you want to spare and love them.
Now, taking those things into mind, do you see why people love this game?