i don't think it's exploitable, because you need to be careful on the ground. If you shoot to the side, you get pretty fast, and will hit spikes pretty soon.
And in mid-air, you would still have only 2 bullets. Just a suggestion though ¯\_(ツ)_/¯
I dunno, that's looks like a normal jump to me. I want the player to make choices, what to do with the ammo, at which moment, do I keep 1 bullet for gaining speed or for jumping ?
If you look at the level design you will see that I leave some spaces to the player to reload and many opportunities to use his bullets in different ways. In LVL 4, just at the beginning, you can use 2 round to do a safe jump or only one for a risky jump, but just after that you face a turret and you need to take reload in consideration, thats the kind of things I want the player to think of. For me the reload brings tension, space, and can be used in little puzzles.