There was an explosion, and you lost everything
Good game. It was crazy-ly fast paced, upgraded in such a way that the game was still challenging and yet fun, and the music and graphics were good to. I especially liked how even when the firepower almost covered the screen, you could still see the bullets coming at you due to the color difference. Usually you can;t see them until it's too late in games like these.
Although, like everyone else is saying, the restarting with beginning firepower makes the game impossible. You need to have either the enemies lay off or something, because when you're dodging a literal tidal wave of bullets with only 19 more to come, you need to be able to kill the new enemies coming up to destroy you. This was especially a problem with the homing missles, as you now lost the small chance you had to dodge all the regular bullets and the rockets. Perhaps, when you get hit, the weapon goes down by one level, and maybe if the bullets were a little smaller for the enemies, it'd make it a lot easier to dodge.
But other than that, it's a good game and only needs minor tweaks. 4/5 9/10.