This is a fantastic idea and it's executed really well. The only thing was that I struggled to get past level 13 as I didn't realise that you could combine different inputs to get entirely new effects that weren't just additive like the jumping until I read the comments. I think adding a level towards the beginning that really forces you to find that out would be the only thing I'd add. Really amazing that you were able to complete all this in 48 hours!