On the first loop I spammed left click; on the second I regretted my past actions. Hella simple, hella fun! The simple artwork goes very well together. For some improvement, I would recommend adding a little more to the game, maybe like more movement. Second, I would recommend changing the audio. The sound can get really repetitive, especially if you spam a lot. Maybe add some different shooting sounds to keep things interesting.
I would really appreciate it if you where to give feedback on my game :D