It is so cool that somebody actually thought of making a game like this with an added value. Amazing!!! Mucho "Likes"... And good luck "Knowin games"... 5/5
Very nice and cool game. some ideas for improvement:
1. the level design is too easy. you have to let the player be on the edge.
2. may be you should consider to add some shadow to the shapes to increase the layer thing.
3. in the level with the house the shapes become smaller, it's not the right thing to do.
4. idea: every wrong click on the wrong shape will reduce from the time gauge.
that's it for now, nice game!