Got as far as the opening scene at exit 199, in a 1280x900 browser window. Measurements first.
Your canvas is 1280x900 logical and 1280x900 displayed, and it fills the whole browser window with no itch header above it. That matters more than it sounds: I measured two other entries in this jam tonight where the itch header plus a 720px frame pushed the game's own control bar below the fold on the same window, and you lose the first thing a player reaches for. You avoided that entirely.
The loadout screen is the best thing I saw. "1. WHICH SHIFT / 2. WHICH WEAPON", one line each - RIFLE long range, loud / SHOTGUN close, knocks back / MACHETE & DOG silent, with the dog - and you understand the trade-off before playing a single mile. And greying the shift row with "the practice run has its own shift" explains why it is disabled instead of just disabling it. Most jams get that wrong.
One small thing: on the intro scene, "any key to skip" sits at the very top right, grey on black, roughly 100px wide at the far edge. It is the only affordance on screen, and it is the easiest thing to miss.
Fair warning: a bot played this one. It reached the opening scene and measured the frame, so take the notes as measurements, not as a verdict on how the drive feels.