LocoRoco demo solution...

[Shinji]

Warning! This one here is a BIG spiler so if you'd like to complete the demo on your own - don't read beyond this line: :)
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For all the others: I'll write down all the secrets all the way. Try to collect all of the flies (541). So let's go ;P

Oh and:
mojo = spider thing
loco = these little singers ;)

At the very begining (when you fall down) there are 3 flowers. First go left and jump on the ledge, the first flower is under the second ledge (2) - I'll mark the number of loco's that you should have. Then go right. Take the flower (3). When you see the spinning circle take the flower (4) and the second one is on the other side of this circle (5). Move right and collect the flies. When you exit the "tunnel" jump above it. There's a flower on the top (6). When you see the bush stop for a while. Loco will shake flies out. Move along and collect the flower (7) but don't go down. There's a hidden chamber above the flower. It's not neccesary to eat this things that lay on the ground. If you stay long enough an orange fly should appear. Now go down. Collect the flies in the chamber. Go right - flower (8). Kill the owl, and go down. Jump on the pillar and go up. Take the flower (9) and jump left on the small ground and again left. There's a "sucker" here ;) Use him to push the red button and then through the pipe - you found the firs man (1/3). Jump down. Tilt down and make one Loco. Flower (10) and down through the tentacles. You'll land on a flower which will grow (11). Don't go beyond the flies. Stop before them and make a hole in the seiling(how do you spell that?). Another hidden chamber. Take the flower (12) and jump up, take the flies and then left on the platform - button. Take the man (2/3). Continue on your journey. Look out for the spikes and mojo. Flower (13), wheels, flies, slide... and welcome night :)

Go further and make one Loco. On the jumper - collect the flies and the flower (14). Jump LEFT - there's a hidden jumper in the mountain, and then up-right - a 2way pipe ;) Now return down and smash the wall. Another flower is on the green's head - you'll have to wait before it grows large (15), then down and another flower (16) (if you fall down or get squished go left and through the green leaves) Jump further up and down the stairs -flower (17) and a mojo. Stop under the moon until it awakens. Then with the jumper up-left. Collect all the flies and a flower will grow under the right vertical jumper (18). Continue. You'll find yourself in a chember with a moving jumper. Don't jump right yet. On the left side there's a C-shaped fragment of the mountain - there's a tunnel there. Collect all the flies above the two balls and in the U-slide. Then go up-left - there are 3 orange flies. Collect them but don't jump down. A flower will grow (19). Now go up-right and further an the solid ground - a man (3/3). You'll fall down on the moving jumper. Now right. Through the pipe. Go left if you've fallen too far from the mojo - shake the bush. Go right. Don't stop where the red flowers grow. Go up and on the platform - take the orange fly and right, the last flower (20). Now return to the flowers and smile :)

Phew... You completed the demo. Congratulations :D

My record: 7:57:77 :P

PS. Waiting for more...