Unity 2D Html5: Fix my game's movement

Job ID: 31174518

Budget: $30 – $31 USD

Hey so I'm developing a 2D Unity game. But I'm stuck because I have a problem with movement. The problem is that when you move, it is "jittery" and not smooth. The camera must follow the player. Check out the file to see if it is as such on your end too, to make sure. You move and it sometimes passes faster than should. It works better on my N2DS devkit console but it still works badly there. I need you to:

1) Fix the problem completely
2) Tell me what was wrong
3) Not create me any new problems

The project right now is very small, because I have just started it.
I have even uploaded it here.
The work should be quick. It is currently made in Unity 5.6.6f2 because I port it to the N2DS devkit that I have. Please use only a Unity version that is compatible with this one.
I am currently offering you $30
Thank you
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