Blocky Warrior? What is that? A minecraft youtuber? Nah, I'm just teasing. It's a nifty idea you got there, but the enemies have so much health that using up your health is a waste of time. I find it easier to dodge their projectiles and slowly move towards them. They'll end up backing into the edge and falling off the platform. When I let go of the joystick, the player flicks back to the starting direction, and that's quite annoying. But, I bet you can add some more depth to the game.
If you would like to see my submission, please check out Napalm Town: https://itch.io/jam/gmtk-jam/rate/159296