int bd_hammer_walls_break_delay; // BD hammer time for breaking walls (in BD frames)
boolean bd_hammer_walls_reappear; // BD hammered walls are reappearing after some delay
int bd_hammer_walls_reappear_delay; // BD hammer time for reappearing walls (in BD frames)
+ int bd_num_skeletons_needed_for_pot; // BD skeletons amount must be collected to use a pot
+ int bd_skeleton_worth_num_diamonds; // BD skeleton collected is worth this number of diamonds
boolean em_slippery_gems; // EM style "gems slip from wall" behaviour
boolean em_explodes_by_fire; // EM style chain explosion behaviour