This platformer base is a fairly good one. I got most of the code from Lventor's Perfect Platformer 101 (extremely helpful), except that I modified it a bit. This platformer doesn't let the character go up slopes as smoothly as Lventor's original does, because I didn't add that script, but other than that, it's pretty good. You may use this for your own game. I know I'll use it for mine if it works well online.