According to certain files found in the OSX version of OE-Cake, the developers had plans to make a much more detailed and capable engine. There are a number of cut tools that did not make the current version.
BLUR[]
Not quite sure what this tool would have done. Soften edges, perhaps?
CROP[]
This tool seems to be the result of a series of tools for particle selection, perhaps to crop certain pre-selected particles?
LASSO[]
Another particle selection tool. Too bad this feature didn't make it to the final game, it would have made for a very different engine...
MARQUEE[]
Area select tool for particle selection.
LINE[]
First of a series of advanced drawing tools. This one *really* would have made the game different, I don't know why it wasn't added.
OVAL[]
A useful tool for arbitrary ellipses.
TEXT[]
Presumably, would have wrote letters using particles. Could be a useful feature if they found a way to consolidate resolution, especially because a custom fontset could be used to mass-produce small shapes.
ZOOM[]
Oh boy what a loss. OE-Cake's greatest impediment was it's small map size and lack of a viewport. This tool alone could have made a powerful engine even more so, after performance has been taken into account. Many of the features of this tool can be accessed with the scrollFlag in the Parameters.