Fun little game, i enjoyed its simplicity. My highest score was 38, I don't know if that's good?!

The black borders around the UFOs made the hit box a little too forgiving, but i liked that the acceleration on the projectiles meant that you had to learn the timing. 

Definitely a nice exercise of game design! Your win condition surprised me with its simplicity. Upon first impression, it felt like nothing new, but then I began to realize that not many games actually use "failure to prevent" as lose condition. Being relatively simple, this immediately spurred on other variants, and was solid enough controls-wise (which is what matters in a simple loop such as this one!) to let my mind just drift as I played. That's a type of game that isn't as common, either.

How experienced are you in making games, if I may ask?

Cool game :) The controls felt tight and I liked how you added a tutorial. In terms of feedback, I thought that a different type of lose condition could have made the game a bit more engaging. Perhaps having the enemies randomly shoot at downwards at you would have been more exciting as you try to dodge bullets to avoid dying. Good job overall though!

Decent game