This game was great!
I loved the artstyle and you really made the theme "If you stop you die" REALLY FUN. The games difficulty is really neat as well since it gets really neat the higher your score gets. I don't know if there's a health pack that appears, but I think if after a certain amount of enemies are killed a pack would appear.
I really loved the music theme you had. I just HATE how there wasn't more to it haha. It's actually a really beautiful tune and I think something you could do is when the player increases their score, more parts of the song get added.
I would love it if you could perhaps allow players to configure their controls or make arrow keys a way to move as well?
Also these comments won't affect the rating in a negative way. Just wishes I have haha. Awesome job