The 'NOTHING' level is seriously hard. I've got a fun time playing it!
Although, is it really intentional that you can go back to the previous checkpoint after reaching the checkpoint after it? This ate a lot of my time in playing the 'nothing' level, accidentally triggering the 1st checkpoint after being pushed out of the 3rd one. I just want to know if it is just a bug or not. Thank you! ^_^