Lemmings/Tricky Levels 16-20

Level 16: Luvly Jubly
(Note: this level's name is the catchphrase of Del-Boy Trotter from BBC sitcom Only Fools and Horses. On the SNES version the name was changed to "Lovely Jubilee", probably because the original name was mistaken for a spelling error.)
 * 5 minutes, 80% of 50 lemmings, release rate 76

Have a lemming mine into the floor, then once he's completely below floor level, bash through.

To clear a path to the exit, use the same technique as you used for level 15, except that you may sometimes need to move your cursor position slightly.

Level 17: Diet Lemmingaid

 * 5 minutes, 96% of 50 lemmings, release rate 50

Bomb one lemming anywhere, bomb another when he's under the pillar holding up the flamethrower (and walking right).

Level 18: It's Lemmingentry Watson

 * 5 minutes, 90% of 10 lemmings, release rate 50

The first lemming out digs at the right-hand edge of the rightmost column, leaving a very thin strip of column to his right, just enough to prevent the other lemmings breaking through and dying from the fall. The second lemming arrives too soon to be trapped by the hole, so make him a floater.

As soon as the hole is deep enough that the fall from it will be non-fatal, bomb the digger to release the others.

Level 19: Postcard from Lemmingland

 * 5 minutes, 100% of 50 lemmings, release rate 50

Bash through to the pit. Turn a lemming heading right into an athlete, and when he's near the exit, have him dig for a short while then build to turn him around. Just as he passes above the right edge of the small dip in the rocks under the brickwork, have him mine. If you timed this correctly, the slope will connect with the pit at floor level without breaking through the floor.

Level 20: One way digging to freedom

 * 4 minutes, 95% of 80 lemmings, release rate 60

Block the left edge of the platform (turning a lemming into a blocker the moment he lands is probably the easiest way). Bash through the pillar, then create two athletes. As soon as the first one is over the one-way block and on solid ground, block him, then have the other bash through the one-way block. Release the rightmost blocker.