This is a topic for alternative solutions.
Here are some mine alternates...
DESCRIPTION: No spoilers yet...
Entrance to The Caves
You can totally bypass this hazardous teamwork of getting the prism out and the pink gate open.
The Lost Cave
An easy solution.
The Meadow
A simpler approach to the UFO's problem.
Loof and The Troll
The hidden button can be covered by something else, than the boulder.
Dangerous Encounter
Yes, you CAN bring a steel box to the boulders. When I will remember how to do this, I will post a spoiler for this level too.
Friend's Help
You can save one box unused and you would be able to use it somewhere, if it had use.
Finding a Way Out and The Way In
I already explained in my hints for Creepy Keep how to get one spare box and one ice cube (which can be moved off the green button) So no spoiler for this too.
Base Camp
When all keys are collected, Peegue is able to do his boulders on his own. It's obvious, no spoilers here.
SPOILER SECTION: Warning Spoilers Warning Spoilers Warning Spoilers!
Entrance to The Caves:
Take out one prism of the Peegue's room.
The Lost Cave:
Bring the two steel boxes in the main room and use them to guide the boulders in the right positions. A couple of times you will need to use TP's, but it's easy. When boulders are positioned properly, use one of steel boxes on the button in the cannon's room (there was a button, right?) and POW -- you did it.
The Meadow:
Don't roll the boulder in the UFO, like the creator suggested. Open the way for the cannon, and it will shoot down the UFO.
Loof and The Troll:
In the second room, move the steel box one square to the left and roll the boulder straight in a keg. Use a prism on a hidden button. (If you are feeling MANIAC, you can further use two steel boxes to cover the collapsible bridge and bring a remaining prism and a reflector in the UFO's room to use the fireball to break the keg, and to distinguish the flames by the Kaboom!, but that's really hard and unnecessary)
Friend's Help:
When you are in the place with three boxes, you can save one by a clever pushing. It can go in the green teleporter so 0 boxes are left. But to have one wooden box left, you should push it in the water through the Z-bot's room and the fake wall.
