Yeah, that is true. I decided to do this game for this jam particularly, use the theme or not.
As for the theme, I could have implemented something that happens when the timer runs out (=death) other than directly going to the game over screen. Maybe clearing the screen and allowing to continue game, if enough blocks would have been present on screen?
That way, the block swapping mechanic woundn't been necessary. I just got too "limited" to my current planning for the game, really.
Anyway, thanks for playing!