This is actually a really neat concept, and I love the presentation of it all.

Very cool aesthetics, and a fun multiplayer game-flow. One thing that might make it more interesting is if modifiers gave bonuses for completion [ so, while normal patterns with no modifiers reward 1 point, adding a modifier might reward 2 points, etc. ].

Overall, great job on this entry, it was super charming and fun. Nice work :)