On the first day of Christmas, A lemming gave to me....
A Level That required Digging

On the Second day of Christmas, A lemming gave to me....
A level for Two lemmings

On the Third day of Christmas, A lemming gave to me....
Three Pillars Standing
(Off-topic much?) not any more, it's moved!On the fourth day of Christmas, a lemming gave to me...
Four Wicked hatches
On the Fifth Day of Christmas, a Lemming gave to me...
Five Falling Feet (you know what i mean Right Go splat!)

On the Sixth Day of Christmas, a Lemming gave to me...
A Level full of Sixes (If you that got phobia think of another/alternate version)

On the Seventh Day or Christmas, a Lemmings gave to me
Over Seven Bashers Bashing

I was thinking "Four lemming hatches" but i see Clam got that covered Thanks clam.
On the eighth day of Christmas, Ps'gnosis gave to me
eeeeiiiiight central pillars,
(eeeeiiiiight flying squareeees),

-- Simon
On the ninth day of Lemmas, Ps'gnosis gave to me.
Nine tiny platforms
Courtesy of me, Giga
On the Tenth Day of Christmas, Dma Design Gave to me
Ten of Each Skill
11 different pillars
On The Twelth Day or Christmas, The Lemmings Gave too Me... and Us
120 Levels (12*10=120)

30 Fun Levels

30 Tricky Levels

30 Taxing levels

& 30 Mayhem levels
Merry ChristmasToo All Lemmings And To All a Good night
Merry christmas everyone!
The Twelve Days of Christmas: Holiday Lemmings Edition!
Bravo!