Cool game and concept. This felt like a great introduction to the mechanics, but I'm disappointed it was so short haha.
Only thing to note is that since the key door looks like a trapdoor, I initially assumed it would kill me if I landed on it.
I think this concept could be taken a lot further if you give it more time. Seeing the enemies move outside of the lockstep makes me think it could be interesting if it were more fast paced and there was time pressure. Like say you had to dodge obstacles in real-time and make lots of quick decisions based on what you roll.