Level 1: This one was pretty simple, and straightforward, but nice to play.
Level 2: I actually really liked this one. At first I tried to get something going in the left half of the level until I realized the correct route was going around the right side and coming up with the laser blaster. The way the basher makes the perfect glueing platform is really nice.
Level 3: This one's pretty simple once you realize that you can't get over the block without the roper.
Level 4: I think I got the intended solution on this one, but I did save a sand pourer and magno booter.
Level 5: This one was pretty straightforward.
Level 6: This was a pretty nice puzzle! At first glance it looks simpler than it really is. This one should be possible with 3 sand pourers, but I think adding one or two more would make the execution a bit easier without changing anything.
Level 7: I liked this one a lot. Great puzzle that feels like a good Lemmings 2 level, and plays well.
Level 8: Pretty sure I backrouted this one. My solution was extremely straightforward and didn't use the teleporters at all. I was able to let only one lemming slip past the miner by using a platformer, then made that lemming slide down and platform, and cancelled the platformer with the other miner. I guess I used most of the skills, but it doesn't feel like the right solution.
Level 9: I might've backrouted this one. I saved the laser blaster, a climber, and a floater, but the solution doesn't feel wrong, really. I'm guessing I took the same route as was intended, just saved a few skills along the way.
Level 10: I liked this one quite a bit. Once you realize the magno booter has to go around the solution falls into place. I did find a backroute which saves a stomper and the sand pourer: after you bridge to the exit you use the stacker and build back to the steel. The lemmings will easily survive both falls.

Lifeguard to the Rescue: Majorly backrouted.

Gnarly 180 Flip: Pretty simple alteration to my original solution.

Take the Plunge: I managed to save a sand pourer this time.

Toasted Clam Sand-wiches: I think I finally found the intended solution! If so, I have to say, WOW! This is a devious solution. Your use of red herrings in this level is great, and no, you don't use crawling glitches, but you do use other ones!

Introducing: Beach: A nice introduction to the skills used in the Beach tribe.

A Kick in the Groyne:  Good puzzle. My solution saved a sand pourer.

Diving Board: This one was pretty easy to figure out, but it has a great solution. I managed to save a diver on this one.

Hang Sixty: This one has a good solution, and it took me awhile to think of using the terrain at the right.

Cross Shore Winds: The solution was quite obvious, but the controlling of the surfer and hang glider at the same time was somewhat tricky.

Turn the Tide: I'm pretty sure that my solution is similar to the intended one, but it saves 2 builders. Good level.

Lifeguard to the Rescue: Also a good level. I think that my solution is essentially the same as the intended one, but it saves a sand pourer and a scooper.

Gnarly 180 Flip: Yet another good level! Pretty sure I got the intended solution here, as I used all of the skills.

Take the Plunge: Great level! The solution fell into place pretty quickly, but it's very nice! My solution saved a surfer/diver (I could've saved the diver instead of the surfer by letting the stacker continue until he walked off the edge, the had him surf to the exit).

Toasted Clam Sand-wiches: This one took me by far the longest. My solution seems to be a backroute because of the extreme precision required, though, and the fact that it didn't use the surfer.

Overall, all of the levels are really good. I'll take a look at the next tribe when I have time.
Solutions are attached.