I think some more information for the player would help this game a lot. Something like a simple tutorial with a demonstration. The jerky animations of the triangles and the background make it really to focus on spots and it's difficult to tell what the different arrangements the player can pick from do. I really like the concept for the puzzle though!

Used to doodle on paper like this at school myself. Not a bad game at all. Shame it's gone unnoticed. I appreciate it and you've done a good job with the artwork too. Congrats.