As for the map, it's really short, and doesn't have a lot of variety, but it's a good first attempt.
Suggestions:
- Like the others, I'd suggest not using a spike pit of that size. If you're looking for putting spikes in, use smaller rows instead of large pits, as that doesn't drain the framerate as bad.
- The jumping section at the end lasts far too long without anything interesting. Might I suggest adding stuff to it so it isn't the same thing over and over again?
- Those stairs could seriously use to be possible to walk up. You can walk up stairs that are 24 fracunits or less. It also doesn't work quite right if they're too close to each other, but yours are plenty far enough apart.
- Above all, it's rather short and has no real variety. Might I suggest adding more area to the map?