Nice one! I do see how this can end up like a chaotic and deadly clay pigeon shooting game xD
Art and music was indeed nice, aiming was good, though the difficulty could have started ramping up a bit faster.
Also, when doing a WebGL build, don't forget that Application.Quit will crash the WebGL version. You should put that code between "#if !UNITY_WEBGL" and "#endif" to disable the exit function or do something else (like enabling/disabling the exit button depending on the platform)
Minus that, good entry for the jam!