Er, two bosses? There's two paths that are open when you first enter that have a mini-boss room at the end, and you find the keys to open the door to fight the real boss. The minibosses aren't much harder than trash mobs, but the real boss is actually somewhat challenging.
Only thing I didn't really like about the gameplay is the camera is pushed in too far. Two handers, especially the hammer dropped by the two fatties, seem much stronger to me than all the other weapons in the demo but they are so large that sometimes I can't see wtf is going on with the camera so close.
The blood code system is pretty interesting. I unlocked a full set of 4 passives, 3 different moves that work with 2H hammers, and 3 buffs that can all be used at the same time. The downside was that Prometheus seemed way better than the rest to actually equip, and the ranged/caster ones were especially weak. Could always change later on in the full game, but it was really clunky to have to melee stuff in order to keep using gifts (or just the normal gun shot).