Oh I'm so sorry, it hadn't occurred to me to press the jump key a second time mid jump
As for your idea it sounds fun already, I would not neglect putting some platforming into the mix tho, take a look at arena shooters like unreal tournament, quake 3 or ultrakill for inspiration and adding a rpg system into the mix could blend really well
and sure, don't hesitate to contact me if you need feedback on this game idea
best of luck!