What poses as pretty much the prototype of the Super Mario franchise is quite fun at its very core. An infinitely replayable endless platformer that tasks you with getting rid of "pests" that emerge from the pipes, every few rounds switching it up and adding new mechanics whilst increasing the difficulty.
It's a little bit fun for a couple of moments, the main problem with it is the controls being wayyyyy to stiff (in line with Donkey Kong's) and there wasn't a clear direction of what to do with the brothers just yet, since nearly all of the enemies here didn't stay for the rest of the franchise either with the exception of the crabs or the Shellcreeper being a prototype Koopa Troopa.

It also doesn't help that literally any other version of this game is better than this one.