Very cool tool/game/training! I've always wanted to train my memory more. I number strings are ok, and can be very pure memory test, they remind me of some cognitive science classes from uni... But I would love to see other modes, with maybe objects/images or emojis, or with words somehow, or playing cards (but then theres the hassle of how does the player input the answer). In any case I would like to have it with more narrative prone items as well as numbers.
I hope this feedback is interesting ☺️