Nice concept & very fun to play.
I realized a bit late that you don't need to wait for your chain to diseapear before casting a new one. it became way easier after that ^^.
The fact that you don't really have to click on the enemy or the wall to cast make it a bit to easy. you can basically brut force the game by spamming the click. maybe consider reducing the hitbox on enemies or force the click on the walls.
All in all, very good for a jam game. well done. hope to see more :)