The tutorial at the beginning was appreciated, it’s good to play a jam game were you don’t have to go back to the itch page to check the controls again.
I thought the player’s move speed was a little fast, it made dodging bullets somewhat harder.
Also, there’s a strategy that you might consider cheesing : if you stick to one of the walls and always shoot upwards, you will only have to dodge bullets from the enemies of the other side, it makes the game way easier (too easy ?)
Good entry though, great job !