It's a nice, simple concept that's a lot of fun. The only thing that bothered me is that I initially wanted to complete every single "segment" in one go, but sometimes the goal post was out of reach. Also, I believe that instead of limiting the time for one command, you could limit the time you spend typing the commands overall, so you can reward players that try to do as long command inputs as possible.
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I'm glad you enjoyed it. I was bothered with that as well but I didn't had enough time to fix that which is not very hard thing to do I know :D I realized the time problem at the very last hours. There wasn't any incentive for risk. You can just write one action at a time and make a highscore easily. But there is a problem with your approach too. I believe it would be too easy.