v0.10 is here, and includes a huge selection of additions and improvements:

• ALL NEW NIGHTMARE DIFFICULTY MODE
• 2 NEW LEVELS:
  • 1-6: Shrooms of Doom
  • 2-4: Missile Mayhem
• 3 NEW ITEMS:
• Heart Magnet
• Fuzzy Dice
• The Spray N' Pray
• 2 NEW COSTUMES:
  • Zombie Mail
  • Golden Mail
• 1 NEW MUSIC TRACK FOR EACH FLOOR
• MISCELLANEOUS CHANGES:
  • Dust VFX improved when hitting the ground with your sword
  • Richard now has a dialogue sound effect
  • The portal to floor 2 in the hub is now locked until the player reaches floor 2 for the first time