yeah. there are a couple weird bugs (do not jump onto stairs, you will freeze) but thankfully he's included a way to reset your character's position if you get stuck by hitting f12, which is some really great forethought considering it's a beta and everything.
bugs aside, it's a cool game. it's, like, classic Castlevania, so it's got classic Castlevania difficulty, and the music is done really well. apparently the guy is in a metal band, so that's handy. subweapons are assigned to a different key, rather than up+attack, so I'm hoping this means he'll incorporate eight-directional attacking in the final product, like in Castlevania 4. it's still very much in development, but it's definitely worth a look.