Small bug: pressing "back" on the options screen also automatically started the game when I came back to the main menu.
The music is great.
I'm a huge megaman fan so all of this critique is based off of that and what I expected.
I don't like that there's a slight pause after you shoot a sword charge shot; it's not like that in megaman so it threw me off a few times, but there really isn't a default charge shot like in megaman. I do like having more than 3 lemons on screen at once though, that's nice.
I expected dash to be on the slide hotkey but it wasn't, small complaint. I tried changing the key in options but I couldn't make it two keys (down + A) like megaman. I had to think of it more like the dash from megaman X.
And damn did it feel like megaman X. It looks like the original series but god damn, I swear those tanks that lob shots in an arc are straight from X. Those guys are why I felt like I needed a slide. The arc was perfect for a slide to fit under.
Anyway, I like all of the weapons. The triple blade (I mean that's literally blade man's power from 10, except it doesn't invert the bullet path when you jump) is probably my favorite, though I had to use the sword to beat the last boss.
Very fun!! I wanna play the other demo because I liked this one so much. Keep it up!! I can't wait to play more!