Hm some things are really stupid like aslant jumps without any sign and so on:
1:07 "wtf? fu! bitchcreator"
1:17 looks crappy (uneven ramp, no tirecontect, uncontrollable, just a guess)
2:15 and 3:08 sux as hell or was there any sign i didnt see?
2:41 the bevel of the road tells you a wrong angle to jump
2:52 looks nice^^
decoration is not too important..