Simple, but very efficient in being fun! The new bonuses add an element of randomness and depth to the connect-4 formula. The concept is a good idea, and the animation are fast enough to have a good game feel. The letters of the powerup don't convey really well what they do, so a small text legend in the game would have made things clearer, but even that is not a real problem.
If you want to play our game: https://itch.io/jam/extra-credits-game-jam-4/rate/432457