Alex Kidd in the Enchanted Castle is a 1989 platform game released for the Sega Megadrive/Genesis. It was developed in-house by Sega as a competitor to the Nintendo Mario games, which were hugely popular at the time.
Nintendo‘s 1982 arcade game, Popeye, was somewhat ahead of its time, and also in some respects as archaic to play as a Game & Watch.
It was ahead of its time in the way that it used a relatively high screen resolution (512×448), which results in quite detailed, high res sprites that are unusual for the time.
Unfortunately the same can’t be said of the background graphics, which look like something designed on an Atari 2600… In fact: Popeye is a weird mix of graphical resolutions, but this weirdness doesn’t affect the gameplay at all.