Enjoyable little arcade game! I really like the shape matching concept and the difficulty curve.

I think the gameplay is not terribly exciting, but it's executed competently and you used the limitation well.

I got a score of 410. It's a shame that when you get a bit further and you're doing well, losing one life will likely means you will miss the next shape a s well, because you're probably out of sorts. Maybe you should give the player invincibility until they match a shape again for the first time after dying?