Good job! This game has high potential with some more work. Here are some of my thoughts:
Whilst fun, flinging enemies to each other is super risky, especially when dealing with bigger enemies. I think this is mostly to the small levels, there was really no room to try and get a good spin going. This lead to me finding that the best strategy was to hook on to two enemies, and just avoid getting hit and wait for them to die. This was a lot more effective, but way less fun than slamming enemies into each other.
Additionally, how come you can't toss enemies when you have them hooked? Seems like a no-brainer to me! When I was spinning enemies around me at high speed, it was such a let down that I couldn't toss them away or into a wall or enemy or something.
This game could be very fun, with a little more experimentation and work!