Tender:
Tightrope Dope - didn't expect myself to get the talisman on my first try of this level! Nice builder trick to prevent splatting!
Big Apple - as Icho said, this level is WAY out of place and should be in later-Spicy. I haven't beaten this one yet.
Getting piped up - probably better in late-Tender, it took me a while to figure out the solution.
Revenge of the berg! - not sure if this is a backroute or not, I have one blocker left.
"I finally made it!" - unintended as I didn't use all the skills. Nice teleporter sound!
Lemming squared - VERY clever cloner level! Also really love the pickup skill monitors!
Take a dip - while the constant walker assignment can be indeed kind of annoying (and I was worried I would end up running out of walkers), the solution is still very cool!
Fixing the leak - nice level where despite having 20 builders, you actually have to use them all!
Through the cold steel - another nice level, though as GigaLem said the steel needs to be darker.
The Lemsweeper - this one isn't a good level, as Icho said you can pretty much beat the level by Clear Physics Mode as a guide. Even without using Clear Physics, I don't see any hints that tell me what block is safe to dig through. If you ever update Raylems to remove backroutes, I would replace this level with a new one.
Curiosity killed the lemmings - whew, this one took me a while to figure out! Nice bomber trick!
Hello, Mr. Rigatoni - this one confused me at first, but I eventally figured it out. Very clever solution, especially how I used the climber at the end!
Popsiclem - backroute as I didn't use all the walkers and bombers.
Escaping reality - big backroute, I didn't use any of the cloners. LOVE the locked exit used here and the noise it makes when the exit is unlocked.

Spicy
As cold as it can get - really clever usage of the single-use trap! I didn't use all the gliders and stoners though.
A creep from the deep - I think this can work in late-Tender. I got the horizontal-stacking bridge in this solution.
When life gives you lemmings - I didn't beat this one, it was too confusing, and as Icho said the locked release rate and the many gliders didn't make this fun at all. Love the blenders, that's VERY clever!
Infinite loop - If my solution is intended, it really belongs in Tender. I got the talisman for this one as well!
Snowday in Beastland - very clever usage of the tops of the trees to solve the level!
Cage of Doom - Nice level, and love the fencer-miner used here! Might be a backroute though, I didn't use all the skills.
Stinky Sewers - likely a backroute as I didn't use the climbers and gliders.
The Deadly Circuit - nice way to end the pack! Unfortunately, I didn't get the talisman for this one.