The lag makes it largely unplayable...But it's ok
Personally, I find the lag issue makes the game unplayable. I've tried a number of times and I've jumped at different points when I see a cop car or cop with a riot shield, and each time, I still end up hitting them and falling. Not a huge fan of the game in it's entirity really.
That said, I'm just a player, not a creator, so it's a billion times better than any game I've made :) Keep trying!