Thank you for playing dysprositos, Sorry if something was unclear to you, There's full explanation on how the game works under the games description, including the controls which mentions you can get back to the main menu using the esc button :) .
Also we included the very first level which only has one possible transformation as a learning point so players won't struggle too much but we'll make sure to include a more detailed tutorial in the future.
Glad you liked the music and art!