I just gave the game a whirl earlier. It's really cute! The music also is super chill and gives off a really nice and calming vibe. I noticed that some things like coins have smaller pixels than Lil' Onion, or the platforms he jumps on. If you really wanna go for an authentic pixel aesthetic, I'd make them all the same size pixels. Overall though, I love the cute aesthetic, and lil' onion is super adorable!