Cave of no Control
The game itself was quite well made, i enjoyed it and the concept, but there was one outstanding flaw that prevented me from playing for very long: the controls.
Using the up key to jump and the down key to slide was incredibly awkward for me, since they're so close together. I would have preferred space bar as jump or two alphabet keys, spaced far apart, as jump and slide. An option to reassign the keys would be ideal.
Other than the control issue it's a good game, but that one flaw is enough to prevent me from giving it a higher score.