heheh, well the bat is the easiest boss in the original game, later bosses like frankenstein on level 4 and the grim reaper are insanely hard. also i might have to fine tune the batboss a bit though, could be he's swooping a bit too fast currently.
and i'll probably expand the hitbox of the tiny bats, currently they're dodging your whip pretty gracefully.
and that ghoul wandering around in the darkness in the brick area is a bug as well. i need to put in code that despawns enemies once you reach certain areas. the original really gets hard on level 3 though, with little "fleamen/hunchbacks" causing quite some pain.