1)  Please see pic.  After Jack road the bat mobile down, he landed directly on the yellow platform and the only way off was to die.

2)  Please see 2nd pic.  I don't see the point of pulling the level to open the red trap door to allow the bouncing eye to drop down, when Jack leaves the room the trap door re-sets itself and Jack has to face the bouncing ball again, when he returns with the blue keys to the blue doors.  IMHO, once the lever is pulled the trap doors should stay open that the bouncing eye should be gone.  Just saying.

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