MYSTERY #1
On the TV screen, Saber's side is devoid of blocks, but there still should be blocks left after the Excalibur move.

==Possible explanations==
A. Maybe this game clears off the winner's screen?
I checked a few different versions of Tetris. Based on that, this seems unlikely.

These did not clear the winner's screen of blocks:
- Amagami Tetris
- Tetris 1 NES
- Tetris 2 NES
- Tetris Party Wii
- Tetris the Grand Master 3
- Tetris DS

This one blanked out both sides. However, in the above comic, we can still see the blocks on Illiyasviel's side.
- Tetris Worlds

B. Maybe the "Excalibur" didn't actually end the game? Maybe they played some more until reaching the state we see in the final panel.
- From a story perspective, that seems very weak and unlikely.

MYSTERY #2
What is wrong with that newspaper?