To gain access to hidden spring level. You must go to a corridor where you will find a level that a bull sleeps beside the goul BUT DO NOT ENTER IT. you should jump in the black shadow that's located at the right side of the level. You will then end up in a long corridor that you should keep going until you find hidden spring level.
To gain access to hidden past present level. You must go to the level that you select a clock from your inventory to go to the past. Enter that level from the other side then you will find your self in a bonus level and its B2 (bonus level two).
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