Good one
it was pretty cool, but annoying when it comes searching the last left gems. Also, the nightmare was insanely easy, as soon as you got the Dash boots. I won't spoil how to, but it is REALLY easy. and you can do it with a skill of 0!
Anyhow. Great game mechanics, quite accurate control, not too stiff. the artwork in the end was average, but it's not all about the quality of artwork.