idk if youre interested but i find reading vns to be a good way of playing “games” in jp as well as much more interesting than graded readers. It may be hard and take time, but with a good text hooker and a lot of determination, you can push through a vn and (mostly) understand whats going on.
Like i would rather read steins;gate or other interesting vns at an 85% comprehension level (with a texthooker and yomichan you will be able to understand whats going on) than understanding 95% of whats going on.
I think actually having read works that are only in japanese and targeted towards japanese people (untranslated vns) is pretty neat and makes me feel more fufilled than reading graded readers (although if you enjoy graded readers keep on doing it).
i personally recommend vns because a lot of the lines are voiced, dictionary lookups are super easy, and you can read them line by line at your own pace. Although if youre goal is to “play a game”, idk if vns have enough “gameplay” as theyre more picture books than anything.
one downside of vns is be prepared to make a lot of lookups with yomichan, because for us not very 上手 people there are quite a few new words. But overall i would say if you are getting tired of graded readers it might not hurt to give an interesting vn a shot (if you think youd be into it)