An incredibly charming game with nice music and great animation and visuals. The island is small but densely packed with many characters and sidequests that can be lots of fun to interact with.

However, the minigames can be hit or miss. Some, like Skating and synchronised swimming are extremely fun and addicting. Others, like archery and rugby, are frustrating and unbalanced(archery's harder version is pretty much impossible).

The game is really short and can be finished in like half an hour, and trying to complete it will take 2 to 3 more hours.

All in all, it's just surprising that a google doodle is this fleshed out and they went above and beyond what most people expected.

5 red coins in each level, additional time trials for the first 8 stages, hidden Yoshi eggs(like in Super Mario Advance) and a new score challenge mode and simultaneous multiplayer mode make the original Super Mario Bros feel fresh and worth playing, despite the screen crunch.

However, lost levels suffers a lot in this remake. It loses the unique assets it had, and no longer has new mechanics like wind. Luigi also doesn't have his custom move-set, instead behaving as a Mario clone. The physics also feel off, and the extra worlds (9,A,B,C,D) are completely absent. The screen crunch is also a lot worse here

The game also includes a lot of great extras, like a gallery that fills up as you get achievements(you can even print the photos with a gameboy printer), A calendar and even a fortune telling mini-game.