Part A - Normal Levels - 11
LEVEL 12 - Wretched Ruins
Start by breaking the bridge to the right and drop down for two lums [1-2]. Head right to face a large guard of sorts. To get rid of him, break the bridge he walks on, and leave him to walk down the gap. :) Continue right, go over the moving mine for a lum  and jump over a gap on the right to another . Break the bridge to send another guard falling. Go right, go over the moving mine and you should see a switch beneath you. Don't use your fists - you'll just fall down the pit and lose a life. Instead, send your body onto it and land safely to the left. Then go right, through the door and go over the mine. Get the lum in the air  and reach for another platform. Then you should see some platforms with chained balls on them - that means they won't be around for long after you step on them. Cross them and go over the moving mines to a stone platform. Hang on the bar and go right, going over the moving mines. Drop down to a platform with a moving mine near it and go in the direction of the lum to the left  to reach an extra life, a moving platform and the ~FIRST CAGE~ to break. Two charged shots will do the trick. Go back on the stone platform, and continue right. Go over the mine for a lum  and break the bridge before dropping down for two more lums [8-9] and a Green Lum.
Two mines at different heights go around this next gap. Wait for the high one to come and duck under it before landing on the chained platform and going over the low one to the next platform. Break the bridge and let the guard fall in the gap. Go right, jump on the trampoline and climb up to the top of the chain for a lum . Go and cross two more chains to the left - holding a lum each [11-12] - to reach the ~SECOND CAGE~. Again, two charged shots will work. Go back to the chain you jumped on and go for the platform on the high right. Hit the switch and drop down. Go right, through the door and... uh-oh, there's a guard there but there's no bridge to break and send it down into! Instead, jump up to the chain to the left of it and helicopter over it. Then cross a bunch of platforms and moving mines for two more lums [13-14]. Send your body on the switch and go right to a lum  before landing on the platform and going through the door. Break the bridge to the right and go down the gap for three lums [16-18]. A platform should take you back up. Ride it to its highest height and hit the switch on the left. Then go right, under three moving mines and through the door. Get the lum on the platform, break the bridge and wait for the guard to go down it. Go right again and send your body on the switch. Then go right, go over the mine for the final lum  and go through the door for the exit.
Go right and break the bridge then head left, but... that triggers a boulder coming down towards you! (I never thought UbiSoft would get influences from Crash Bandicoot... :P) Keep going left, break the bridge and go right. Get the lum  and go over the mine. Break another bridge and head left. Get another lum , go over the mine and deal with another bridge to go right. Blow up the bomb above the mine and go over it before dealing with another bridge and going left. Get another lum , go over the mine and break yet another bridge to go right. Blow up the bomb above the mine and demolish another bridge to head left. Get the lum , go over the mine and break another bridge to head right. Blow up another bomb, break another bridge to go left and do the same process down below except you go right after going down. Go over the mine, get the string of three lums [5-7] and jump for the extra life and the chain. Climb up it and helicopter to the lowest platform you can see on the right before breaking the ~CAGE~. Head back to the chain, climb to the top and jump up onto two platforms, going over the moving mines. Head to the chain on the right and go for the lum to the right of it . Go back on the chain and climb to the top. Jump right for another lum , climb up to the next platform, go over a moving mine and head for the chain on the left. Go to the top and jump to the trampoline on the right. Use that to reach a platform with a moving mine and go on the chain above it. Reach the top of it and go to another on the right. Then jump down to the lum on the right  and go back to the top of the chain. Then go on the trampoline on the left to take you to another chain. Go on the platform to the right and go over the moving mine for another lum . Go back on the chain and go to a higher platform on the left to another . Then climb to the top and go on the trampoline on the right to head to a platform on the left. Go over the moving mine and go on another trampoline, which takes you up to another lum  and a purple lum to swing onto. That should take you to a Green Lum.
Hit the switch and go through the door. Break the bridge and go down for a lum . Go left to trigger another boulder chase! Go over the mine near the bridge and break it to fall to another lum  and go right. Shoot the bomb over one mine, go over it, and go straight over another before breaking a bridge and going down to another lum  with a path leading to the left. Blow up a bomb above a mine, go over it and repeat, and break the bridge to go to another lum  and go right. Do the same here, but after getting the lum from falling through the bridge  go left. Jump over three mines one after another and break another bridge to get another lum  and go right. Go over a mine and hit the switch before breaking another bridge to go to the left. Go over another mine, through the door and break another bridge to go right. Go over the mine and get the final lum over the gap , with the exit on the other side.
After you leave the level, climb up the chain to the right and go to the one next to it. Jump off it near the bottom to a platform on the right, to the next level.