Great game idea with linking multiple controls together in a malfunction!
The main thing that I think could be improved is giving the player more time to see and react to the malfunction blocks. That way, I would have enough time to plan out what malfunction I want to select (but a short enough time that I have to make a quick decision about which block to pick).
I think this is a great idea that has the potential to lead to some really interesting malfunction combos!