I don't like the fill colors. Right now you have three fills - full white, very translucent, and "slightly translucent". But I find it very difficult to judge whether a shape is very translucent or slightly translucent unless all the options are on the screen.

This made the tutorial especially jarring - when I saw a white fill blue, and a slightly translucent red, I ended up confused about yellow... was it the very translucent or slightly translucent?

I'd suggest changing one of the translucent colors to a full fill or some other representation, like stripes/polka dots.

Solid vs. Light fill is hard for me to differentiate, especially the last practice "Find the Correct Bin"...could you use a pattern to fill instead? (Much more like Set)

The tutorial would probably be nicer if it were more interactive earlier on, and this would allow you to ramp up players at the same time.

Explain shape matching, and show some example combos, but then dive straight into playing a quick round where the only thing you have to match is shapes. Perhaps use less bins so it's not too easy, and set a lowish target amount of points to move on, say 10 or 15.

Increase difficulty by adding more parameters, I would add colour first, balancing a quick reward cycle with the more complex gameplay.

On the tutorial, with the animations you currently have you definitely need a way to let players skip them. I wanted to quit the tutorial half way through because I already understood it, and the three animations are identical once you know the idea. I was getting frustrated by the tutorial before I got to even touch the game.

All in all an interesting diversion, thanks!

Not really gameplay but the tutorial was slow (paced). I understood most of it by reading the text but still had to wait for the animations and had no way of skipping them.

Overall it was actually more difficult than it appeared on the face of it.

I welcome any comments on gameplay!

Not a comment on the gameplay, but the tutorial is far to slow and drawn out - experienced gamers could have this summarised in maybe 2 images with a line of text each. Maybe under a "quick help" link?

Inspired by: http://en.wikipedia.org/wiki/Set_(game)

Found a bug :)

When placing the third object in a bin clicking several times real fast gets you a) tons of points or b) -1 per click.

is there always a correct solution visible on the screen, or do you have to make some moves based on the likelihood of completion pieces entering the stack from the left?

Fun game, but the bottoms of the squares are cut off sometimes. Edit: also, I get kinda dizzy after doing it for a while. Don't know what's up with that.