I gave the Blade Kitten demo (on Steam) a whirl last night and had a blast with it. The game feels like the illegitimate love child of a SNES-era Castlevania game and Donkey Kong Country.
The trial level was huge, and filled with shinies to gather and secret treasures to find. Also - and despite the crappy keyboard controls - I found that exploration in the game felt really organic, and it was a tonne of fun to crawl up walls and discover all sorts of nooks and crannies.
So a question: has any bought this, and if so does the full game hold up to the promise that's in the demo level? I'm strongly tempted to drop the $15 on the PS3 version, but would appreciate a second opinion.