For me the Game has some layout problems!
I dont know if there is any score, health point or level user interface, but if there is i cant see it!
The bullets you shoot also dont exactly aim to the mouse position, but have a small offset!
I also think the dash feels very weird because it makes your character "slide" which is hard to stop
But after all that critisism, i think the general game is nice, i like the visuals drawn in paint in 30 seconds and the enemy spawning is nice too! A few more enemy types would be nice but other than that very nice game!