Hey all!
Just doing the lecture on playing audio and it reminded me of this website I came across years ago for making you own .wav files.
It’s a little obnoxious, but with a bit of tinkering you can get some nice retro sound effects.
Happy mixing!
Thanks for this @MooseLucky 
If you’ve not stumbled across it yet, we have a Wiki topic for Free and Cheap Indie Resources, whilst the original Sfxr was mentioned on this, I’ve added your link to Bfxr also.
Happy to help!
Now I just need to polish this game a little and we’re good to go!