this isn't a secret that Korean movies are still behind and lacking in good production.
Of course not to mention sci-fi movies which are hard to make, we can say k-movies are still lacking not like Korean dramas because a lot of them still are not good.
Space Sweeper, A Good Sci-fi Epic With Spectacular World-building

I wouldn't say it's on the same level as Hollywood, but it is a really good movie with good production, k- movies need to keep this level and go beyond to make such an enjoyable one.
great effects, the story is good for Sci-fi, and it was fun to watch

Sci-fi like fantasy is hard to make and get people to love( i love those genres from all).
if you don't like Sci-fi you can't force yourself to watch it, but if you with an open mind it's recommended.

so far for is the best k- movie I ever watch, the cast is good and with great acting, we can see here different nationalities
which is cool. (SJK has done an amazing job) , there was some pretty good humor.