It's a nice little timewaster, but the movement definitely took some getting used to. Also the difficulty seems to spike pretty dramatically at some point, going from a very relaxed pace, to a more high speed dodging game.
While it was fun on the higher difficulty, I felt like the only reason I was losing was because of the limitations on my controls. Not so much my lack of ability to dodge incoming blocks. I understand that you might feel the game becoming too easy if you remove the delay, but I'd suggest finding other ways of increasing difficulty rather than adding a movement delay. In games like these, having a character that feels good to control is key to making the game feel fun and in this case, the delay is actively detracting from that in my opinion.
Other than that there's not much too say, the game is nice and simple, easy to understand and the music is a good backdrop for it.