Short, two-page Etude to practice chromatic scale patterns.
The counting is easy as the LH provides the beat. The note-reading could be challenging for someone new to chromatic scales. However, there are no sharps or flats in the key signature which instantly eliminates one possible challenge.
Technically it is not as difficult as it may seem at first as most of the triplet chromatic scale patterns are less than a measure long, providing frequent chances for the RH to rest or at least breathe. However, like with any passage work, it is important to not press / push into the keys.
While the harmony of the first two lines is very traditional, using chord progressions that an (early) intermediate pianist would be familiar with, from the 3rd line on there are frequent modulations and surprise key changes.
Musical / interpretation challenges could be to keep it light, to shape the many short melodic patterns, and to play with a smile.