[Small][Tutorial][Easy/Very Hard] Ball Tutorial v2.1

Playthrough of Advanced mode:
http://www.youtube.com/watch?v=kcs1KfFnuYU - ending 1 (standard)
http://www.youtube.com/watch?v=VcCN-WVOVDo - ending 2 (secret)
http://www.youtube.com/watch?v=dQQo9FphylA - ending 3 (very secret)
http://www.youtube.com/watch?v=l8ZKjMO3NAA - ending 4 (Very secret)
I encourage you to figure out the first 2 endings by yourself before watching the videos. With the clues I've placed in the level finding the 2nd ending should be pretty interesting. The 3rd and 4th endings are especially hard. I've added them when I figured all places I thought are unreachable can in fact be reached.
I've updated the level a little. Only fixed one non-solid wall in the Very secret ending, as I once managed to get through it.