The game becomes rather easy when the mechanics are figured out. "Teleporting" by taking the cursor out of the window makes the ship unable to shoot properly, but "small jumps" are still allowed (dev oversight lol). Also, pausing the game numerous times to adjust the ship is possible and makes the hardest challenges easier.
Sadly, the game lags a LOT as the screen fills with bubbles and bullets and that makes everything else easier, as the reaction time increases dramatically. Couple that with proper positioning on RED powerups (gamebreaking, more of) and a screen can be easily cleared out without much effort. Why the game lags so much is a mistery because it's a fairly simple interface, nothing 3-dimensional or flashy in effects. Reducing quality barely does anything.
In short, interesting game, but coding could be done much better. It would be much better to put a "wall" around the screen to prevent any kind of teleportation, for example.