Thanks for playing.
Maybe making the jump button as hold can work, but the issue with that is about how quickly should the player jump if the player so choose to hold the jump button.
When I first came up with the idea my main focuses are about how some enemies would need to be sniped by accurate jumping and about how the player's DPS is partly constrained by jumping (since if you shoot too fast you'd be stuck on top of the screen) - but if you pay enough attention you might notice that it is only partly constrained. DPS can be increased by a pretty decent amount even while hovering by making short bursts of quick successive jumps - I don't think I will automate that.
Maybe though I would make the automation much lower than the humanly possible max DPS (or another thought is that holding is for automatic hover-jumping), and still encourage the player to mash their keyboard a little if they want optimal gameplay.