Yeah, the difficulty ramping wasn't really built out. The number of enemy spawns increases, but not a ton. I was thinking about tying fire rate to vehicle speed and making the score based on enemy kills, so you have to balance vehicle control with weapon use, and also wanted to have more complex (and dense) enemy patterns but instead I spent a million hours trying to find the perfect song and making VFX. Also I never put in powerups...I wanted to reduce the fire rate in general, but have relatively frequent crown pickups that would boost it.