Thanks for playing! I appreciate it.
I looked into the issues you mentioned. So I think the 'R' you saw is actually the letter "A" haha. This game supports Xinput/Gamepads as well as keyboard and mouse. The text you saw is just a hint, and the 'C' key is to close the dialogue. You can view every hint from the pause menu if you miss one!
Some input hints update dynamically based on the detected input, but I didn't have time to update them all. Which I agree is confusing. Not to mention, Raylibs default font can sometimes be a bit tricky to read.