Thanks for playing and leaving feedback! Yes, the double jump is tied to momentum: you can only perform it when the yellow icon in the bottom left corner is lit up, before reaching a deadly amount of momentum (to prevent jumping a second before landing to not die, making all other mechanics useless). Also there is the option to control the character in the air by dashing left or right (LShift), and you can use it if the blue orb in the bottom left corner is lit up (once per fall), but it's very powerful and tends to be useful in larger movements like avoiding big obstacles. We will surely look in making more adjusted air options in the future! :D