I don't think they are far off take the things from undertale on the things from this game and put them together see what matches might not be many but there are some
some examples that I see similar to undertale from the description
Traverse through a nightmare like realm similar to undertale
You play as a silent effeminate Protagonist, seemingly dropped into this world, now you must survive and find a path out similar to undertale
one primary weapon similar to undertal