Beating games (when 'not' on 'trainer mode') was a challenge that I personally enjoyed - and I 'did' beat a couple of really difficult games. However some games simply cannot be "won" (best you can hope for is high score - which is fine!) while others (like 'Saint Dragon') are designed to make it effectively so. ;c)
I've for a long time wanted to sink my teeth into classic 'Megaman'/ 'Mario'/ 'Sonic'/ 'Zelda' games - but sadly didn't get around to it. :c) Their day will come. ^_^
Oh... and definitely agreed that 'something' that was great about some retro games is missing in most of today's titles. :c)
Thanks for the comment @ahmadmanga. ^_^