One of the biggest complains on the demo was weapons system. Original design contains one main weapon and a few additional guns that spend players coins (also they're characters "souls" - he loses them if dies). This system is crap because even if player loves the guns and want to use them, he prefers to save his "souls".
So I changed it!
Now character has multiple weapons that he obtains after beating bosses. And these guns are improved by "souls" that character collects. On characters death however, an active gun loses its upgrades. So it's basically the same system that were in Cave Story.
And this is three various-level attacks with a sword that character gets after beating the Orgin Muder!