Short perception games are more useful when you treat the result as feedback rather than a label. One simple routine is to compare your first estimate with the revealed answer, note which kind of error repeats, and try another round without changing strategy mid-test. I used perceptle at https://perceptle.online/ for a quick check across quantity, motion, angle, timing, and proportion. It takes about two minutes, and the per-test error is more informative than the total score alone.