I like that you did some singing!
Keep up the singing, you're getting better at it. There was a little bit of off key - it's harder to sing on key when you have headphones - this is a trial I went through (and still go through). I just do a lot of practice here and there, literally just singing intervals as quickly and accurately as I can, especially in the car when there's nothing else to do.
Great stuff though, I thoroughly enjoyed this.