The mechanic really has a lot of potential. I thought it was pretty fun lining up all the enemies and jousting through them.
The only suggestion I have would be to change the way the jousting works and make the clicks independent of the player's hitbox. It was quite difficult to click the player while I'm running around away from everything. I had to slow down to click the player and joust across the screen. I think if you either made the hitbox better, or just made it so you can click and drag anywhere on the screen to get the same effect, the mechanic would be a lot of fun in a full game.