Got to the final level in Blazing Lazers without dying... and then my hopes and dreams exploded into a ball of fire.
DO NOT THINK that the final stage in Blazing Lazers is impossible with zero firepower. FAR FROM IT.
The last stage in Blazing Lazers is totally passable, even if you were to start with a pea shooter (no power-ups).
The "secret" is to adjust your speed as an offensive/defensive strategy:
(1) BE AGGRESSIVE when you can! MAX speed to take out the alternating waves on left and right. You'll be surprised how much area you can cover with MAX speed + pea shooter.
(2) KNOW YOUR LIMITS: REDUCE speed when you have to carefully dodge stuff in certain segments (i.e. the enemies that home-in on you...they are a little tricky if you are at the wrong speed).
(3) Slowly, you WILL get some gels and elevate above the mere pea-shooter.
I've been a broken-record about SPEED+PEA SHOOTER in Blazing Lazers, but I'd like to think I'm inspiring hope.