While I immediately loved the gorgeous visuals, I gave up after 10minutes of failure, because I didn't understand what I was supposed to do on the space bar and mouse tasks. After reading the comments here, all saying everything but the WASD parts is very easy, I decided to give it another try. Once I understood that I just had to spam, I finished the playthrough and came to really love the game as a whole.
My initial issue was probably that I didn't know the meaning of the word "mash" :)