As someone who never plays shooters, that sensitivity was way too high for me and made putting the gun down and manoeuvring between the buttons more frustrating than it should be, although that could just be skill issue on my end lol. The gameplay loop is good, just there could be more to purchase/upgrade and maybe having another window on the side so the enemies can go to more than one window would be good to help mix it up a bit. I didn't manage to complete it and only made it about 25km, having the distance travelled on the game over screen would be good too. Also on one of my runs I ran out of ammo and didn't have enough money to buy more (also a skill issue but annoying lol). I think the shotgun should fire multiple bullets in a scatter so you have more chance of hitting the enemies without having to have exact aim. Its a good game, its a nice take on the theme and I think with a few changes it could be really fun, nice work