I really loved this, good work incorporating the jam theme. I think the Tetris section was my favorite.
The Pac-Man section was cool, but I found that the loss of visibility made it kind of difficult to tell if a jump/fall was safe or if there was a ghost nearby. Additionally, it would be good if the mushroom reset back to its initial position if you die with it during the second part when looking for the portal.
I also really liked the general artwork, music, and movement, and the platforming felt pretty good to control in general; good work.