This seemed like an easy game in the first level where the enemies are slow and you can move smoothly.
But then it got so hard in the succeeding levels that I rage quit a few times.
The difficulty increase was gradual and the music was good.
But, the worst part about this game is that if you press the space bar to shoot at the instant the level ends, you get killed (99% of the time atleast). After dying for the 50th time because of that, I decided to call it quits. You should immediately rectify that.
If there's no way out you could atleast have given an audio indication when the timer reaches 5 seconds, because it's not possible to keep watching the timer.
Overall, a decent game. But, it can be much better if the glitches are removed.