Good concept, the one jump one attack mechanics work great and fit the theme well, the bounce pads were a neat addition too, the minimalistic look works well here, i especially liked the fact that every useful info is displayed directly by your character.
I'd say there are still small issues though, i think since you are already limited by the fact that you have only one jump one attack etc... there really isn't a need for the time limit in levels i.m.o. also the bouncepads in one level didn't seem to boost you quite enough that made one of the jumps particularly hard, i'd say either boost them a bit, or have the player be able to jump in mid air if they didn't use their only jump before using the pads.
Otherwise it's quite good and has imediate fun when you play it
So congrats mate ! :)