I liked the theme, the overall style with the fitting soundtrack. Really nice mood.
After I found out that I could use the mouse to aim (...) it was a much better experience than in the beginning.
The menu is pretty annoying and it makes me feel it wastes my time, especially for a score based game. Each respawn is annoying because I have to wait for the menu to appear and at least for me, the mouse didn't reallly work very well on the menu.
The aiming also felt a bit weird, I guess it was because of the camera smoothing. Somehow it didn't shoot where I expected it to shoot sometimes, I guess that part could take some more polishment :)
Overall, an interesting game and the leaderboard certainly made me want to come back to it again!