I think if Construct have Per Pixel Alpha Blending would be great!
To those who do not know what is Per Pixel Alpha
Look this Example:
The Scirra on the forum is not a picture posted on the forum, but in an Application Per Pixel Alpha.
You can Drag and Drop only in pixels of Scirra.
There are several projects of Per Pixel Alpha in WEB.
Search in Google "Per Pixel Alpha Blending" for look Projets from C++/MFC to C#/Windows Forms. The concept of creating a per-pixel-alpha blending window remains the same, the GDI function UpdateLayeredWindow.
ou also like the Per Pixel Alpha Blending in Construct?
Sorry my English, i From Brazil