Every time I took the TOEIC test, my score got worse and worse.
Every time I played that game online, my score went down.
この場合、次のような言い方ができますよ。
ーEvery time I took the TOEIC test, my score got worse and worse.
「TOEICのテストを受けるたびに、スコアがどんどん悪くなっていった」
ーEvery time I played that game online, my score went down.
「オンラインゲームをするたびに、スコアが下がった」
このように Every time I ..., my score got worse and worse/ went down のように言うことができます。
ご参考まで!