The boss of Angel Alcove, Medusa! Use the Mirror Hammer, (Given to Teddy by Amy Rose), to whack projectiles back at Medusa! Use the arrow keys to move and jump, and hold space to use the hammer!
Thanks to @thedededestroyer55 for the music. I'm not sure if the music in the project will be used for this boss, it may be used for the final boss, Marx. (He's from Kirby. Look him up if you dont know who he is for his boss battle and music.)