For the button mashing one, I had originally assumed I was supposed to mash mouse clicks, which I could never quite complete, but once I figure out you could type on the keyboard it was a lot easier. And for the deleting the code one, I would try and delete each character rather than just triple click to highlight everything and hit delete once. I guess for some those might have been obvious, but it took several tries for me to figure it out :)
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Thanks for the feedback! I've added little icons to show which control scheme each minigame uses, this should make it more clear you can mash with your keyboard and that you can select the text with your mouse. I've also balanced the deleting code minigame so that you can also win by holding backspace if you select the end of the code!