Thanks! Yes, we've already thought about that. When the steps you get from the timing bar would land you on a trap, the step counter turns red before you move. The first time, a short message also pops up to explain what it means, so you learn to watch your last step. Once you've cleared a level with that type of trap, the warning doesn't show up anymore, because by then you know the rule.
If you give the game a try, I'd love to know whether the warning felt clear enough.