Features of MidiWorld! 1.1.5:

• Playlists
• Ability to change tempo
• Looping capabilities (the whole list or just one)
• Drag-and-drop reordering of the list
  
• Preferences and Default Playlist
• Ability to change reverb
• Ability to change transposition
• Ability to change position of the midi
• Ability to change volume of the midi
• Drag and drop files onto the list or the app
• Shuffle the list
• Ability to run from commandline
• Other misc. features