Thank you for your feedback! The ennemies not showing their path is a bug actually, the ground is a bit too high on some levels and hide the arrows...This is fixed on recent versions but we're not able to submit any new build until the end of the jam.
That's a good advice for letting players move as they want. This is one of the frustration point that comes back, that your are committed to your input choice and need to time precisely when you will have to release the key. Maybe slowing down a bit the movement will help a bit as well. I thought about some hidden helper that will try to help you stop on the correct line, but it implies some level knowledge, and it starts to melt my brain...
I've also put some tutorial and a faster reset animation to remove some waiting time and make the experience smoother :)
Thank you again for your feedback, it's highly appreciated!