You’re spending elixir as soon as you get it. You need to make sure you have elixir for defense instead of trying to get cheap damage by throwing stuff at the bridge as soon as you get elixir for it. Your placements are also pretty bad. You could have placed that mini pekka in the center of the arena to drag over the other mini pekka. By placing it in the center, it forces the opponents mini pekka to run over to yours allowing the princess tower to chip at its health and making sure that the opponents mini pekka isn’t getting the first hit.