Khan academy, Beast Acadmy and others make math problem into fun contexts, especially for younger ages!
But real games – checkers/chess/go. In my opinion, it is a must if you want to become a T’Ch. These games require strategic thinking, sevorah, and, most importantly, you verify your intellect against a worthy opponent. You can’t simply claim that you mastered this game by sitting in a shiur if you lost 10 out of 10 games. So, after you master it, you know the level of your thinking and also what types of thinking you are good or bad at – intuition, long analysis, creative, memorization. You can apply results directly to your learning and also to working on improvements. Maybe the best would be to play with your yeshiva/seminary chevrusos. Then, you would know whose opinion to value in learning. FWIW, R Feinstein played chess until he was 9 when he felt that the game was interfering with his learning.