You could easily make this into a fully fletched puzzle game (well it already is, but you know what I mean). I really want to see this as bigger game with more levels. Even without more mechanics, there are a lot of possibilities to create new challenges just by adjusting the level layout.
I'm not sure if this would break the balance, but maybe you could consider adding the option to look up, which colors corresponde to what movement. A player doesn't need to use it, but they can if their memory isn't so great.
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Nooo, they all should struggle! I'm kidding)) Thank you for your ideas and a nice review! It means a lot as we are considering of making a full version out of it. One of idea, for an easy mode - to have a timer with the hints you mentioned. But otherwise it doesn't make so much sense, as a puzzle supposed to train you logic/memory. It's like imagine a maze, where you can see arrows where to go - the whole concept of the maze breaks. So, may be some small hints if you really stuck and have already lost too many lives.
Once again - thank you!