This game screams online tw0 player!!!!!!!!!!! Great job. Customising your avatar would be good, also a practice alley. Different leagues (towns) and have a league shootout at the end of each week (knock out tournament) of the best shooters from each town to win medals/titles/custom objects for your avatar.
oh.. and obstacles just feel weird... a hill maybe but a 'bird bath' where the bowman has to use gravity to kill the enemy just isn't normal. A fort with windows or bushes at long range would be more suitable with an emphasis on aim rather than power... it's nice just to pull back and 'twang' it!
A continue is a must, I don't think there are need for guns and I would love the arrows to stay in the body with a little bit of blood and some groans... maybe make your aim shake/sway as your hp meter goes down? If you did that I'd play for hours.
SNEAKY START = Press UP on the words "GO!"
Tips:
Front Wheelie = Prisoner F
Rear Wheelie = Cycle King/Spoke
Flips = Farty Pants
Boosts & Time Trials = Sir Colin
To get 5x Boosts Use Sir Colin and Bunny hop + Backflip till 5x boost then just win the race and top your boost with backflips.