cool game, the slow bullets can make for some unexpected moments. i think the game should progress a little bit faster and because losing life is pretty hard because when i eventually got bored i stood in place to die and even with tons of enemies on top of me, it took insanely long to die. you should add more types of enemies that have some unique mechanic instead of speed like shooting projectiles or something, another thing with enemies is you could add some type of warning where an enemy is gonna spawn like a portal opening or something because they just randomly spawn on you and you lose health. i think you should explain to the player that you can walk to the end of the screen to teleport to the other side, you should also explain how the player gains health because i didn't notice what gave it. still a decent game but with some changes and additions it would be a lot better