I like how the game starts. That menu zoom-in is pretty neat.
Regarding the gamedesign you have few problems. First of all, is a lack of mechanics. You have like what, 2 weapons and 1 shield? At least I coudn't find anything more than a pistol and a machine gun. I kinda like the idea of an upgrades system, but when my machine-gun is taken away from me because I picked an upgrade for a pistol isn't really a way to go. Maybe you have weapon switch mechanic here, dunno, but I couldn't really find it. Also about the dice switch. You either should make some trigger to change the level or make it more like "waves". Right now that "dice roll" feels really weird. The fact that you die from a single hit doesn't make game more fun either. These kind of games should have health systems. Potential thing that could make pacing of the game more intuitive: slightly faster running speed, dash ability, some kind of obstacles/covers on the levels.