Added collisions with objects on scene

Player will now be stopped by fences
Also added the possibility to define the size of ground
Also edited speed of animations
Also optimized the loading of fences

src/objects/ground.js

@@ -1,8 +1,8 @@
 //ground
 import * as THREE from 'three';
 
-export function createGround() {
-  const geometry = new THREE.PlaneGeometry(10, 10);
+export function createGround(height, width) {
+  const geometry = new THREE.PlaneGeometry(height, width);
   const material = new THREE.MeshBasicMaterial({ color: 0xa3c973 });
   const plane = new THREE.Mesh(geometry, material);