I agree with Kenshin that finding enemies amongst the bullets in a very white environment is actually intriguing. The control scheme is also very interesting, as Cirno is tanky, but the enemies are not, while Cirno can shoot from all four directions, whereas the enemies can only shoot from one. But with no SFX for bullet hits and the like, there's no real way to understand advancement and ultimately no reason to keep going.
Feels more like a tech demo than anything, but the tech is at least interesting. You did work by yourself, so I understand time restraints. Maybe having a team could have fleshed out this idea to fruition? Either way, I hope to see you here again!