It seems the game doesn't work well on PC, which is unfortunately what I played it on.
idk if this is how the mobile version works but the attack button would just cause some projectiles to appear momentarily and move in the horizontal direction I was going. Pressing it again would cause them to reappear momentarily still only moving horizontally.
Additionally, restarting the game would return me to the exact situation I was in before. If I died to an enemy, then I would return to the enemy being right on top of me.