What could you do?

Change the humanoid's JumpPower. That way the player can jump higher and fall at the same speed. You're going to have to use the PlayerAdded event to get each player and CharacterAdded to get the character to get the Humanoid.

JumpPower

JumpPower is the velocity you will move in the Y axis when you jump. It MUST be a number between 0-1000.

PlayerAdded

Is an event inside of the Player Service that will run whenever a player joins the server and returns the argument of the player.

game:GetService("Players").PlayerAdded:connect(function(player)
    print(player) --Prints the player's name
end)

CharacterAdded

After you locate the player you can use CharacterAdded to get the Character. This fires everytime the character spawns so if they die it still runs after they respawn.

game:GetService("Players").PlayerAdded:connect(function(player)
    player.CharacterAdded:connect(function(char)
        print(char) --Prints the character's name
    end)
end)

Final Product

local strength = 500 --How high you'll jump

game:GetService("Players").PlayerAdded:connect(function(plyr)
    plyr.CharacterAdded:connect(function(char)
        repeat wait() until char:FindFirstChild("Humanoid")
        local h = char:FindFirstChild("Humanoid")
        h.JumpPower = strength
    end)
end)

Hope it helps!

Just change the jump power which is in the players humanoid -script- random player.Character.Humanoid.JumpPower = "how ever high you want to jump" 50 is default.