"it's a good idea to have holding and dropping on two different keys"
Well, the idea of the ONE button came from Smash Bros Melee's Single Button Mode. I kinda wanted to see how far a single action button can do. Course there are other games out there that can be done with only a single button. I can make some adjustments to the hold action, as you only need to hold the key for 10 frames (1/6 or a second). I could adjust it to about maybe 15 or 20 frames (1/4 or 1/3 of a second) if it helps with the cpu. Apart from that, thanks for playing and for the feedback.