I really look forward to the inclusion of shaders. I completely needed OR and ELSE logic so my vote was for that but shaders are my next vote!
Bob Thulfram, funny you mentioned SVG because I recently posted about using the SVGCanvas plugin to create a blurring text effect. The filter code, derived from Inkscape, can be used with any SVG.
You could potentially draw an SVG shape at runtime and apply the filter to it. If your game will involve graphics as simple as those in the Evac game you linked to, I imagine you could use purely that.
By the way, that Evac game looks great and ironically, the idea of pushing blocks to destroy enemies is an idea I've had in my mind for quite some time now. Though my thought is to destroy the enemies by surrounding them with blocks. Cool game though, that Evac.