The game is extremely hard on the eyes.
The game was great though, i enjoyed it!
A few things i would add to make the game better though:
1. colored distinctions between the common, uncommon, rare and uniques. even if that just is coloring the wording.
2. in Endless, maybe not limiting the upgrades and actually make the game "endless"
3. if not going that route, in the upgrades tab, highlight them in a different color to show it is maxed out.
4. im not sure if this was intended but counter strafing is more effective than braking.