There are 11 achievements for Lost in Paradise, 1 Hidden one, 5 Easy mode ones, and 5 Hard mode ones. Getting all 11 should only take 2 playthroughs (one of each difficulty), and I recommend doing the easy mode one first, because the difference is pretty minimal and hard mode will go much faster if you already know what you're clicking on.

The first thing to remember in any playthrough: See that button with the question mark at the top right corner of the screen? Don't click it ever. It's the hint and puzzle skip button and pressing it will invalidate your run from earning the no hints achievements (flawless and master flawless), and the runs won't be hard so you won't need the hints anyways.

First to outline the achievements you'll be getting here:
Finisher: Beat the game on easy mode, pretty straightforward.
Flawless: Beat the game in easy mode without hints, same as the one above effectively because with this guide you won't use hints.
Spin-ster: Finish a Tile rotating puzzle on easy in less than 60 seconds, I will include pictures of the finished images for all the image puzzles to make these processes easier, though most people won't have trouble with them even without the pictures.
Switcher: Finish a tile switching puzzle on easy in less than 180 seconds, same as above
Slider: Finish a block puzzle on easy in less than 80 seconds, I will include a set of instructions on how to do these as well, but again it likely won't ne necessary, I got all of these achievements first try without a guide. They give plenty of time.
Monster Bane: This is the hidden achievement, and requires you to land consecutive hits on the final boss, which is also pretty easy and I'll show the way I used to get this easily.

Ok, jumping right into it, when you finish the opening scene go through the tutorial, which will leave you with a pebble and a journal. Make sure you pick up everything you can from every area, if you're not sure you can always click the button in the top LEFT (not right) to see what is clickable in an area.

First thing's first after the tutorial ends and you've grabbed all the stuff there, go to the left a bunch through a few areas until you reach the dead end with the chest and the shells. Again, grab everything along the way because I won't be outlining the specifics for how to find everything, just how to progress through the puzzles.

Here is your first puzzle, it's a Tile spinner puzzle. Create the below imagine in less than 60 seconds for the spin-ster achievement, it won't be hard.




After you've looted that chest, start heading right a bunch until you reach the bamboo gate. Use the handle from the chest on it and you will see your first block puzzle. Below is a screenshot of the final solution, it should be easy to get there in 80 seconds.




The next bit is fairly achievement free and easy enough to do, basically keep going a bit, find the rock and make a knife with the rock and pebble, cut some bark off the tree, pick up the sticks near the tree, and head all the way back to the campfire site, which was one area over from the first chest. Make a fire and put it out with water from your conch. Next go into your journal and piece together your map, which will allow fast travel from here on.

Now you can fast-travel back to the forest and head left into the woods, where we will find our 3rd puzzle, which will finish your puzzle achievements for easy mode. This will be a tile-swapping puzzle, just shift the tiles around until you get this image.




From here, the only thing left to do in easy mode is get the hidden achievement and win, which I will outline how to do at that point. So from here just follow the advice in the letters you find and make sure you read the tips on all the items in your inventory. A short outline of the objectives from here is as follows:

Travel deeper into the woods until you reach the bridge you can't open, and grab the plants there to make rope, then go one area back to the next chess and lasso across, beat the puzzle and take the stuff and go all the way back to the beginning of the forest, grab some tree sap with the jug you have and make some pitch at the campfire. Now go to the lake and catch a fish, tie put it in the cage and tie some yarn around it, then use it on the bird. Get the bird and use the yarn and the pitch on it, you'll need that later.

Now head back to the cliff and rope down it. Lasso across the river and do the puzzle. Get the bamboo piece and use it on the puzzle by the waterfall, and then go through to the bird's nest. Use the bird cage on this.

Next head back to the cliff and go right to the snowy area and dig up the next chest. This one is solved with 5-3-2-4-3 if you didn't memorize the painting in the cave. Repair the telescope and use it to read the flag in the area to the right and the flag by the lake. LAstly go grab the contents of the locked chest in the cave.

If you didn't miss anything you should have everything you need to finish the game now, but if not the items you should have are 6 different colored gems, a bow, some poison arrows, and other stuff you don't need anymore. Travel back to the bridge and put the stones in the tree based on the flags you saw, which should be saved in your journal. Go across and solve a couple more puzzles (the circle one is from the second puzzle in your journal) and it's boss time.

This is where the hidden achievement comes in to play. Pegging to boss twice in a row is pretty easy, I'll include a picture of the angle I used at around 75% power, should be fairly easy to adjust.




After killing the boss you should get the last 2 easy mode achievements (and hopefully the hidden one if you hit him twice in a row in the face), leaving just 5 mirrored ones in hard mode.

This part of the guide should be fairly short. You have these 5 achievements to get.
Master Finisher: Finish the game on hard, will be pretty easy.
Master Flawless: Finish the game on hard without hints, should also be equally easy.
Master Spin-ster: This time you have 240 seconds to finish a tile spinner puzzle, the first one should still be plenty easy, use the reference image in the easy mode part of the guide.
Switchmaster: You've been given 720 seconds to finish a tile swpping puzzle, the first one of these you get should also be easy enough to do in that window, again with the reference imagine above.
Slidemaster: Par for the course this one is also pretty easy, you have 360 seconds to do this, just use the first slide challenge at the bamboo door.

Not much else to say, the story is exactly the same in hard mode, do all the same stuff and you should easy finish these 5 achievements.