Loved it! I really like the feel of the game, it's really cool that you get power-ups when shooting down specific enemies! Good game design, because I learnt quickly, which adds what! :)

Putting this all together in a last minute 2 hours is pretty neat xD nice one, the game is cool and I love the particle effects on dying - Only thing I might adjust is the randomised starting score, I guess it ties in with the theme of some rounds having the advantage but it just made me want to hit R until I got  a score as close to non-negative as possible before I started playing.  

Nice timelapse!