I've craved this game for a long time, and when I finally bought it, I was left very disappointed.
In a game where the gameplay it's uniquely about jumping and running around, if you built a physic engine that makes you feel as heavy and agile as an elephant, you did it wrong. Terribly wrong.
If you like jumpmaze things buy DOOM2, then play the Jumpmaze mod with Zandronum; it's easier than you think, full of tutorials and, despite obvious engine's limitations, you can fill it up with HD textures and fancy effects so that even if it will never look as good as inMomentum, it will be an enjoyable jumpmaze experience. Definitely better than this.
Average aesthetics, not remarkable, not despicable.
+Sound Effects & Music
If you need ratings:
I am aware that a 2 is a very low rating but... As I've already said: if it's all about jumps and the physics are bad... They did it wrong. I recommend you to try the demo before buying it, if you like the game and feel comfortable with its physics, I guess that 10$ could be a fair price.