I finally managed to reach it! I still find it a bit tricky to control the jump and aim properly. What if pressing DASH twice gave a higher jump? It feels more intuitive than using W, since that’s usually just for moving forward.
Great! I wanted pressing DASH to switch us to aiming mode, and releasing it to make us jump in the selected direction. Just like shooting a bow in games, but I see that this is a problem for many, and I need to think of another solution. And I haven't implemented the control change in the game yet. It's a little easier on the gamepad (which doesn't have full support yet).
And yes, DASH is higher than normal JUMP.