I need help with this (Strange OhNoes error message)

First of all, your code says:

Player.draw = function() {

This code will never run. This can be remedied by doing this instead:

Player.prototype.draw = function() {

And repeat that for all of the functions (except the Player constructor).

Then, you must define a new player.

var player = new Player(0, 0);

Finally, fix the bottom of the code

if(keyIsPressed && keyCode === UP) {player.jump();}
    player.draw();