Thanks for the feedback. You are right in seeing the similarity to source games, particularly portal really. To comment on your suggestions.
1 - I can't believe I missed that, I must have deactived the collisions by accident before building. I normally deactivated the door collisions so I could skip levels quicker for testing. Must have forgot.
2 - The guide text mechanics I'll definately add, thank you.
3 - I am unsure what you mean. But also the black boxes are static and cannot be resized. Only the blue boxes can be scaled and moved. To get past the part in your screenshot you use a blue box to jump over it and use the scaling mechanic to get to the platform. Though there might be other ways. But I can always make the platforms larger as it won't effect the level that dramatically if there is a problem with movement like you mention.
Thanks again.
