No worries about the bugs! I can imagine how difficult it can be to develop a game, so bugs are expected! It's good you're encountering them now so you can find out what might not be working, or what's bugging out! You're doing you best to catch them and fix them, so already you're doing more than other developers would!
I found it by accident! I had accidentally changed the Resolution scale to below 50, and it the screen was so messy that I couldn't see a thing! I spent about half an hour or so trying to click where the buttons might be because I couldn't see them at all! When I finally fixed it, I could sprint! It took me a while to figure out what I had pressed it, but I found it! XD