for you first flash ill give it a 7/10 because most people first flashes arent even good enough to make it on the portal.
Art: 4/10 it wasnt bad but also could have been alot better, with practice comes perfection. The character could for example have been more detailed as could the background.
animation:2/10 quite poor animation you used alot of motion tweens with basically little to no frame by frame. Although i liked the lighnign strike.
music: 10/10 the randomness of the music in this flash is what made it reasonably watchable, it went well with the strange concept.
Other comment: there are to many improvements that could be made to this flash to list, however for a first attempt it is very good. Dont forget the more effort you put into a project the more satisfaction you get out of it.