It's unfortunate the web version does not work, but such things might happen in the stress of finishing up a game jam. The downloadable version requires an absurd amount of GPU power for a simple 2d game, but with unoptimized unity rendering thrown together in two days that's also kinda ok...
On the game itself: It's not the most innovative take on the theme, but adding the time delay adds some interesting twist to it. With the higher delays (> 2s) I ended up waiting a lot, to see how the second character will move, maybe some kind of forecast or a "skip to end of delay"-button would be helpful for this...
For a jam game I really liked being able to freely choose levels, as it allows to quikly get a good idea of the whole game, even when struggeling with one level or after restarting it.