In my Keen opinion, this is hardcore! It's a very short mod, yes, but it's one of the cleverest mods around. You play as that blue 'Birdman'. There's really cool ideas; in the world map you can fly, and so can in the level -- level is actually Well of Wishes replacement, and the swimming ability of Keen is replaced with the ability to fly as Birdman.
Also, features the Dopefish and cool ending scenes tweaking.
Br1ck and the mates are pioneers on this area (and overall in Keen 4-6 engine stuff) and hopefully we'll see more from these guys. :)