Some people point out that the controls are bad, I just want to justify my choice.
In most common platformers games, the challenge is in the enemies or something else, and jumping from one platform to another is a formality.
In this game the gameplay and the challenge is spaicially to be able to jump from one platform to another, that's why I used physics to add more difficulty, the main characters have acceleration and different weight and speed, that's why you have to be precise in your jumps and learn the skills of each character.