Pretty good, but..
.. it gets kind of boring after a while, the thing that kept me going was the scoreboards.
I am in 22nd place =D
PROS:
You can build your own character
You can save, and then load your character
Loads of combinations for character customization.
Scoreboards
Reset/kill button in case your guy didn't go as far as you wanted him to
CONS:
Short
Repetitive
Music gets slightly annoying
Graphics are not too good (although you can't expect much from flash, and I'm just being picky now)
OVERALL: A decent game if you have time to waste and good for the competitive types (Scoreboards), but the fun only lasts for a while.