Mediocre at best.
As Rupee said, the controls aren't fit for isometrics. Also, as you go up ramps, you don't adjust position to fit. In addition, you made the shadow practically opaque. Finally... you just drop off when you go over the edge in the slightest, which makes you fall off in the stupidest of places (such as falling off the corner of a tile with a ramp under you, while still dying).
You submitted a freaking demo version that had three levels and made you go to the site to play the rest, complete with shoddy isometric programming.