[Izuku isn't particularly fussed about "winning" so much as he is about getting Bakugou to sweat enough to make the explosion desired. So he's largely going to be moving defensively, while also not giving Bakugou much opportunity to beat him to a quivering pulp if he can help it.
He takes advantage of said walls at least, leaping up onto one and springing off again in a different direction to avoid the Bakugou currently rocketing towards him, hoping to get him moving around quite a bit. When he gets too close for comfort, setting off small explosions dangerously close to his face, Izuku retaliates by aiming a punch at his side to encourage him to back off.]
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He takes advantage of said walls at least, leaping up onto one and springing off again in a different direction to avoid the Bakugou currently rocketing towards him, hoping to get him moving around quite a bit. When he gets too close for comfort, setting off small explosions dangerously close to his face, Izuku retaliates by aiming a punch at his side to encourage him to back off.]