This was really fun and cool game! I enjoyed it a lot. Only suggestion I have in mind is that you could quicken the rewinding process somehow. Before I got the tank upgrade it was really frustrating to wait for rewinding. Most of the time people were very far from me and it took too long to get rewinding.
Nice environment and graphics. Music and sfx suited well in the game. It was one of the best Jam games I have played so far :)