Kenta Cho’s Tank Fires Block delivers on its name. You are a tank that actually fires blocks (and shots). The blocks act as a barricade to protect you from weaker enemy shots. However, your shots and the bigger enemy shots will destroy the barricade. Your cannon shot also destroys enemies and their firepower, creating a chain combo if it clears multiple enemies. In theory, you probably want to keep yourself safe long enough until a lot of enemies line up for a big combo shot.
Even with the ability to make a barricade, I didn’t survive long because I failed at aiming with the arrow keys. All this I guess is an excuse as to why you won’t find me high up on Tank Fires Block‘s leaderboards.