You'll need to install this for the game to work correctly.

http://www.microsoft.com/DownLoads/details.aspx?familyid=15FB9169-4A25-4DCA-BF40-9C497568F102&displaylang=en

and if it STILL doesn't work you'll probably need to update yo framework.

http://www.microsoft.com/downloads/details.aspx?FamilyId=333325FD-AE52-4E35-B531-508D977D32A6&displaylang=en



If you don't have a gamepad the controls might be a little awkward on the keyboard, I know.. But the controls are as follows:


Arrow Keys: Move
A - Jumps/Cofirm(menu)
S+Arrowkeys: Shoot rope
E - Shirnks rope
R - Expands rope
Q+ArrowKeys: Shoot unicorn
Enter: Change unicorn speed (starts at med -> fast -> stop)
End: Menu


If you DO Have a joypad for the computer you should get joy2key (http://www.electracode.com/4/joy2key/JoyToKey%20English%20Version_files/jtk374en.zip)  and map these keys to your joypad. Makes the game feel a lot better and easier to play. 
 

IT SHOULD ALSO BE NOTED THAT LEVELS 2-1, 2-2, 2-3, AND LEVELS 4-1, 4-2, 4-3 ARE NOT IN THE GAME. They will make it crash if you try to load them. Other than that, godspeed.