Understanding the style is crucial for Prokofiev's works, and this piece is no exception. Basically, the tempo should be consistent. Changing or fluctuating the tempo in the B section is strictly forbidden. Both the A section and B section should maintain a single, consistent tempo.  

In the B section, consider the section itself instrumentally. Imagine what instruments are playing the melody line, accompaniment, ornamentation, etc., and visualize the instrumentation. For example, consider the melody line from measure 30 as a violin solo, and listen to Prokofiev's violin concertos to grasp its characteristics.  

Even in the glissando sections, one can imagine percussion instruments like marimbas playing along in the background; this can be envisioned by listening extensively to other works by Prokofiev.  

Now, what I am about to discuss may sound contradictory to what has been stated so far. While I have stated to "maintain a consistent tempo," there is one specific "surprise" section in the piece that I, as the author, simply cannot leave unemphasized. Fortunately, "rit." is written in that section, but I would almost want to rewrite it as "molt rall."  

That specific spot is the chord between the 3rd and 4th beats of measure 79. By abruptly slowing down the tempo here and emphasizing it (not by playing loudly, but by expressing it exaggeratedly slowly), the surrounding atmosphere completely changes. It is no exaggeration to say that this Prelude exists for these 3rd and 4th beats; it is a beautiful section. For your reference.