Uno Mas: Swimming Level

function water(x, y, z, sX, sY, sZ, c) {
  box3D(x, y, z, sX, sY, sZ, c);
  let vel = player.vel[2];
  player.vel[2] = 0;
  if (keys[8] && isColliding(player.pos[0] - player.size[0]/2, player.pos[1] - player.size[1]/2, player.pos[2] - player.size[2]/2, 0, 0, 0, x, y, z, sX, sY, sZ)) {
    /* Create colliding platform */
    platform3D(player.pos[0] - player.size[0], player.pos[1] - player.size[1], player.pos[2] - player.size[2] + 2, player.size[0]*2, player.size[1]*2, player.size[2]*2, color(0, 0, 0, 0));
    player.onGround = true;
  }
  player.vel[2] = vel;
}

platform3D(-50, -50, 0, 100, 100, 10, color(128, 128, 128));
water(-50, -50, -100, 100, 100, 100, color(0, 255, 255, 0.2));

if (player.coins == 10) {
  for (var i=0; i<objects.length; i++) {
    if (objects[i][0] == 0 && objects[i][1] == 1000) {
      objects[i][1] = 0;
      objects[i][2] = 0;
      objects[i][3] = -50;
    }
  }
}





addCheckpoint(0, 0, -1);
addCheckpoint(1000, 1000, 1000);
addCoin(-24, -40, -76);
addCoin(40, 47, -44);
addCoin(-29, 10, -67);
addCoin(-38, -9, -11);
addCoin(20, 4, -25);
addCoin(-42, 27, -55);
addCoin(14, -6, -43);
addCoin(-23, -27, -45);
addCoin(-43, 8, -19);
addCoin(44, -29, -72);