Good game.
Positives:
- High-quality art - very nice
- Had audio including a slick beat
- All that is done, is done well
- Nice vibe
Things to improve:
- The voice acting has bad audio quality, but still cool that you put in the effort to spice up the start menu
- Very simple gameplay and is a bit too easy, but that's more of a preference thing.
- When the timer ended nothing happened, just enemies stopped spawning. An end screen showing your score and other stats would have been nice.
Because the gameplay is simple, you clearly have polished everything else to a very high level, so there isn't much to criticize/suggest.