Nice game! The spaceship felt a lil slow to control, so it was a bit hard to position yourself well or avoid projectiles. Also, as the level got harder and you needed to be bigger to destroy shields it also made it more difficult to use a larger size, since you'd absorb a bunch of bullets in the are and then when you ent back to small you still had to shoot a bunch to manage to kill anything. At least there was no penalty for letting enemies get past you and out of the screen, so that's a nice way to balance that it's hard to destroy them when there's so many.