How can you look at yourself in the mirror?

Thinking of cheating on two pianos.

Yes, of course one can cheat (everyone does). In fact if you make a truly terrible mistake, remember to immediately look angrily at your partner.

Anyway, here are some interesting pieces you may wish to investigate:
J. C. Bach – Sonatina in G major, Op. 15 no. 6 (Schott) – Not difficult.
W. F. Bach – Sonata in F major (International Music Co.)
Bartok - There are a number of pieces in Mikrokosmos for two pianos: Book 2 no. 43, 44, and 55 and Book 3 no. 68.
Richard Rodney Bennett – Kandinsky variations (Novello)
Brahms – Sonata Op. 34 bis (International Music Co)
Variations on a theme by Haydn Op. 56b (Schirmer)
Busoni –Duettino concertante (After Mozart) (Breitkopf)
Chabrier – Trois valses romantiques (Enoch) – Salon style music.
Chopin – Rondo in C major Op. 73 (Schirmer) – Surprised?
Clementi – Sonata in Bb op. 12 and sonata in Bb op 46 (Schirmer) – No more difficult than Mozart sonatas.
Debussy – En Blanc et Noir (International Music Co) – 3 pieces, quite difficult.
Percy Grainger – There is quite a lot of two piano works by Grainger, mostly arrangements of folk material. Most of it is published by Schott or Schirmer – have a look in their catalogs.
Paul Hindemith – Sonata in C (Schott)
Schumann – Andante and variations op. 46 (Schirmer) – not so difficult – nice on account of the back and forth dialogue between the two pianos.
Stravinsky – Sonata (Associated music) – moderate difficulty.
Just the tip of the iceberg

. (And by the way, I have not played any of these

)
Best wishes,
Bernhard.