Congrats on the submission!
Not sure if I didn't play long enough, but I'm not certain the upgrades did anything. In fact, I feel like I was moving slower with 2 speed upgrades than with none. I also had 1 damage upgrade and it still took 3 hits to defeat an enemy. As I say, maybe I should have let it roll on, but the gameplay didn't exactly inspire me to keep playing.
Note to other players/raters: full-screen is necessary as Start button is otherwise hidden in the embedded version.