Wow! This game was awesome - I had a ton of fun playing it. I got through the tutorial and first two levels, and then got stuck on the third because my computer couldn't keep up.
First off, the music is a banger. And then the movement and platorming is addicting. To be honest, I would play this game just for the platforming alone, but then there's also shooting *chef's kiss*.
In terms of feedback, I feel like the second gun's damage output doesn't keep up with the first in terms of the pace of the game. Additionally, I know you're probably already working on it, but a level select or main menu would go really nicely.
I'll definitely be watching for Cyber Rail on steam. Great job!