offwhitefox, yes, you can put in your own files. They just have to end in .cs. You could actually delete, or change the extension on the .cs files in there currently if you don't want to play those ones.
Regarding the {, I realize they are hard. It was worse when there wasn't sound. I was thinking of putting a buffer on the Y axis when landing so that you could re-jump sooner. Or maybe made it so the jump was high enough that you could skip over it if you timed it right. Yes, I should have done that I think.
Thank you guys for the input. I know this was just a quick game, but I am really grateful for it because as I make more games, it will be easier to see these types of pitfalls so that I can get rid of them and make a game fun.