That's pretty much the end of the demo - Theres some places you can go to for example going right, outside of the post office area you'll find an angel statue that gives access to the test rooms
That's the plan - I'm still toying around with the difficulty, but the first area is supposed to be fairly easy to introduce you to the game - later once you have around 10 health enemies will start doing more damage, be resistant to some attacks and have more difficult attack patterns.
Plus the upgrades at the convenience store will have their cost's adjusted eventually