w,a,s,d foucuses on velocity pretty realistic eh, limit of jump can be proven to fly somehow and super speed is possible - This is the basic things of my usual gaming code, a lot of my best platformers have been made like this -Really exaggerates the velocities, shows which way it is going and variables of the speed. If you stop pressing the desired way that you were going. The speed slowly slows down. Again this is simulated realistic.
buttons m and space you can fiddle around with and yea. Added- running particles Drag platform- try it out! (not a platform when being dragged) Constant speed is 9 , need to accelerate by pressing d for 7 seconds to reach "9"speed.You can drag bars velocity X,and the highest speed is "100" speed . Velocity Y because of gravity will fall to -1 and 0. changing the gravity in the console "change velocity X by -1" The more gravity applied the lower negative it goes. I find -1 to be most efficient.