The old game everyone knows built with an arduino nano
cradits go to https://www.diymachines.co.uk/make-your-own-simon-says-memory-game
I designed the Case and modified it slightly to use 18650
Arcade Buttons: https://www.amazon.de/gp/product/B01N549IDL/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Buzzer: https://www.amazon.de/gp/product/B07MJ6ZRLB/ref=ppx_yo_dt_b_asin_title_o07_s01?ie=UTF8&psc=1
TP4056 to charge and protect the 18650: https://de.aliexpress.com/item/1005001580997981.html?spm=a2g0o.productlist.0.0.27ed70f92Gq7JP&algo_pvid=b7500195-a991-4355-9cfa-3a7eebacaaa3&algo_exp_id=b7500195-a991-4355-9cfa-3a7eebacaaa3-7&pdp_ext_f=%7B%22sku_id%22%3A%2212000016673297098%22%7D&pdp_npi=2%40dis%21EUR%21%211.77%21%21%211.49%21%21%402100bb4916551143493141023e402d%2112000016673297098%21sea
The author hasn't provided the model origin yet.