the item with the name "Locked" so is the tangerine cat, but to unlock this, you should put the cat near the machine to blow the machine up to unlock these tangerine cat!
so if you complete the GrindCraft game, so the game won't reset and you will able to open all other maps that you have passed! this game is so AWESOME!
 "Everybody Edits"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}
 "Shift"){kind=icon}
 "Tangerine Tycoon"){kind=icon}
 "Idle Hero Defense"){kind=icon}
 "This is the Only Level 3"){kind=icon}
 "Super Karoshi"){kind=icon}
 "Aground"){kind=icon}
 "Gravitee Wars"){kind=icon}
 "Idleplex"){kind=icon}
 "GrindCraft"){kind=icon}