Immediately after the first screen, you will find a pit of spikes with vanishing blocks over it. Cross the pit using said blocks and climb the ladder. Get close to the edge of the ladder when trying to jump left so you don't hit the ceiling and fall. Waiting for the electric blocks to stop, jump over, up, and over, then climb. There will be another block pattern. Memorize and proceed as with any such puzzle and note that one block appears directly over the other, so at the lower block, you must jump again quickly. Get past the next electric blocks. There is another block pattern, but with a fan pushing you back, and different timing: the blocks only appear one at a time and stay on-screen much longer, i.e., the 2nd block appears at the same time as the 1st one disappears and the 3rd at the