If you want advice on future game design decisions, I would recommend not making the first platform dangerous right out of the gate. Typically you give the player a small area where they can prance around and test out the controls. As it stands, on hard mode you just start off dead if you dont move, falling platforms punish anyone wanting to catch their breath. Falling platforms are good obstacles mid stage, but not starting out, and certainly not every platform. Games dont have to be a non stop rush. It's good to take a break and have safe areas every once in a while.