Key features

• Changing gravity
  Have you ever wanted to walk on ceiling? Well now you can!
  
• Bullet hell
  All the bullet are physics based (no hitscan) so you can dodge most of the bullets (with a bit of skill)
  
• Bullet time
  Just somewhat standard slowing down of time. Really helps with dodging bullets and also shooting down enemies while in air. Are you asking why would anyone do that - because it's cool!

• Melee
  Because sometimes you just want to punch someone in face with mace (or sword or axe).
  
• Dashing
  Skip short distance frontward. Help with platforming. Also good to get out of hard to handle fighting situations.
  
• Bossfights
  More enjoyable to fight with than your common foe.