Hurrican level isnt impossible - at least it's easier than normal level in Captain Binary or Xain D Sleena.
Which means that it's possible to achieve two goals simultaneously - make good looking game with decent gameplay. <--- hint for 95% of indy developers
In this case - great looking game with fantastic gameplay.
These three guys also achieved unachievable - captured the golden years of Amiga spirit. Forgetting modern graphics and animation this game plays like Amiga platformer from early nineties.
I'm 15 years younger!!