Wow, thank you so much for the kind words! No, that thing you described was 100% unintended, thanks for bringing this to my attention! It was important to me that whatever replaced jumping shouldn't work too close to a jump, for example, I thought about letting the player throw a grenade down even on the ground to instantly be sent up, but that's just jumping except you have to push two buttons instead of one. What you discovered is literally the same thing, hahaha!
Thank you for playing my game, glad you liked it!