I've been playing this game for past few days. But those playing times lasted only about five minutes each while clearing only one or two stages.
Anyway, for last more than two hour sessions, I have now beaten the game for the first time (yes, I don't count in beating the game back then when I was playing this game with my friends back then, since they were the pros in this game),
The last results are:
Time exact 4 hours + 23 seconds
Cleared: 67 percent (35 exits with mario, 34 with Luigi)
Points: 2 817 310
Oh yeah, and I beat with Luigi, since it was finally his turn. And I didn't use the any of the Detours (No Star Road, no Back Door, All Koopa Kid Castles smashed). And Larry's Castle was as annoying as ever.
I really recomment this game for those who haven't played Super Mario World before.
Especially if you like to play as Luigi, since you don't play in 2P-mode and he has "flutter"-jump. But unfortunately he runs a little slower, so he's actually more challenging to use.
As for the voice overs, well, that's was nessessary. And there are some other voice effects and music that actually really didn't need a "update", especially when fighting againts Koopa-kids. And *spoilers* the end fight was made really dull for the reason that there was the overhead-HUD shown, with timer in it. Yeah...
Another challenging thing about this remake was, that you have to "pan"-screen quite a lot with L-trigger, mainly because well, the screen just is smaller than your TV-screen. At least the developer were fair to keep/add this feature.
Oh, I don't if it is a bug or what. But Yoshi is not supposed to devour his prey right away in this re-realise. But in some of the stages he returned to his old habbits, which is really odd in my opinion (I guess he just now has a "hunger"-meter in this game).
One thing which also makes me both confused and irritated is the new added "collect the Yoshi/Dragon-coins"-feature. In this game the game is true 100-percently completed until you get all the coins. While I think this is awesome, it's annoying that I can't collect the coins again for extra lives. Instead when I visit the stage again, they're just regular coins. Wow...
In overall, this is the good old same Super Mario World like back in 1990. I really recomment you give it a try, whether you're seasoned SMW-veteran or you never had a chance to play this game on Super Nintendo (rainbow color buttons for the win!)
This version certainly has more replay value than the original, if you're not too scared of some remix musics and voice overs. However, I personally want to play the original game sameday again, mainly because of the original music, no voice overs and really odd SFXs and bigger screen.