Nice... a few suggestions though
I liked it... I think it would be much better though if you changed/addes some things.
1. Lives - Dieing, and then starting alll over again kinda sux
2. Powerups - This would give us an incentive to kill enimies beides raising our score and also would and more depth to the gameplay. ex. new weapons (some sort of shooting weapon, maybe a "laser bow & arrow to keep with the knights theme), health power ups, invulnerability, ect.
3. Fix the lance - Good idea, but the delay makes it tough to kill enemies without taking damage
Good game though - If you made a new version in the future I'll be sure to check it out.