the first english tomb raider i put in my phone,i passed the 1st level but can't gain acess to 2nd level... for the second one( current one), i passed level 6 but at the level selection stage,the number 6 is still grey and i can't gain acess to level 7. i killed all enemies... did i miss any thing? tell me if there's any secret area in the stage where i probably did not notice... or is it a bug in the game???

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