Tip: Make sure that ALL exit-enabled pipes, doors, etc. have a screen exit defined, or they'll take you to Level 0, the "endless" bonus game. Unless Start+Select is enabled, the only way out of it is to reset the game.
While it's a very good attempt, I have to reject this graphic due to the exanimation.
First, make sure to animate everything at the same frame. Slot 00, Slot 08, Slot 10 and Slot 18 are frame 1, so you should put the exanimation in these slots, so they don't desync. Putting everything in the same frame, makes it look smooth. Also, removing the "white" pixels from the background makes the water looks slight weird. These pixels when animated, give an effect of crystaline water to the waterfalls, so make sure to adjust that. While copying and replicating 1:1 the Exanimation of the original game will be very tough, make sure to do it as best as possible. Fix these issues and I can accept this rip.