I didn't really test the scoring today but I got the feeling that 3 people is right on the limit of enough/not enough people to keep the game fair and interesting (with this points system). Although we weren't scoring today, the game was still pretty enjoyable. So I reiterate; the feedback was very good.
Since testing today I've polished a few details. The cards now look like this:
Much more efficient use of space and paper
It'll be interesting to see whether the experimental green 'concepts?' work or not.
Actually I'll have to include a version without the colors for people with imbalanced ink ratios in their printer (or color-blindness). I worry that people will find it difficult to read the text (which is obviously very important). Unless I decide to use shape categories, the colors are just aesthetic.
I didn't use my graphics tablet to make these, unlike the previous shapes, but I quite like the wobbly outlines. It gives the shapes character and distinguishes them from the other set of shapes.