Really clever idea! I like how it quickly becomes chaotic with all your past selves shooting all over the place :D
I played on PC where the controls were a bit awkward, but I imagine it would work really well with a controller.
15 loops was maybe a bit high, and I was a bit frustrated hat every time you touched a past self you instantly died, but it did add to the stress x)
Graphics were really simple but charming, I especially liked the wrecking ball thing in the beginning, a bit scary looking. Overall a good submission, and very impressive for your first game ^^