your main enemy in the game is the speed and speed upgrades as at some point, jsut holding the arrow keys will boost you so fast, you hit the wall and are kind of stuck to it for the next 2 seconds.
movement then becomes kind of impossible.
also 2 things:
would be nice if the attacks werent limited to the cone sicne no matter how many damage upgrades you get, it sjut fits them all into the cone, sjut overlapping.
and no matter what yous eem to need about 3-4 waves of bullets either way to kill an enemy.
would also be nice to know the enemy hp so we know when it takes damage and how much health it sitll has.