Hydro Corp 2
This optional level has to exits, the one in the lower part of the level is easier to take, whilst the other at the top is more challenging. There's only one green gem to get through the exit, so Keen must decide which path to take. In any case, completing the level makes the barriers fall near the submarine.
This level has a total of 75,200 points (v3 beta2): 59 Lolly Twistpops, 29 Pink Lemonades, 9 Hotdogs, 16 Rainbow Sherbets, 14 Cake Slices and 3 Ice Cream Tubs (5,900 + 5,800 + 4,500 + 16,000 + 28,000 + 15,000 = 75,200). Not every point is accessible without cheating though. There are 4 Lolly Twistpops behind the lower green door, while the 3 Ice Cream Tubs are behind the top green door. That makes 74,800 or 60,200 points in the end. 40 Water Bottles can be collected too.