As someone with similar goal like you (in my case, I want to be able to read Japanese novels), I understand the rush. However, there’s no need to compare yourself to others since our memory and retention work differently.
If you have build enough basics on grammar, I really suggest you immerse more on reading. If you think NHK news or other graded readers will bore you, you can choose an easy game (Japanese-wise) that really interest you, play it an hour a day (or up to you how long), and finish it no matter what. That way, you will not get bored, learn some vocabs and kanjis on the way. You will realize at the end of the game that you have improved reading speed and some repeated words on the game are instilled in your brain!
I’m actually reading a novel right now for the first time. I vowed to finish 10 pages a day. I started realllyy slow; I needed 2 hours or more. Then, now on my 20th day, I can read the 10 pages in less than an hour. This is because I got used to the narration and have memorized words the author repeatedly use. Most of these words are not in WK, but uses the kanji introduced by WK, so it helps in reinforcement.
Since you want to be able to play games in Japanese, it’s better to build game core vocabulary early on. It’s okay to get low percentage on reviews, especially since WK incorporates so much vocab that you may not use at all. Don’t worry, I still get wrong answers on political and baseball stuff here, since I don’t really encounter them a lot.